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Home Return to list Heat Advisory 0007 Issued by the St. Louis Forecast Office
Action: New Issued At: 2026-08-09 01:06:26 435 WWUS73 KLSX 090605 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 105 AM CDT Sun Aug 9 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-092115- /O.UPG.KLSX.XH.A.0003.260809T1700Z-260813T0100Z/ /O.NEW.KLSX.XH.W.0003.260809T1700Z-260813T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Union, Edwardsville, Jefferson City, Saint Charles, Chester, Cahokia, Alton, Fulton, Belleville, Sparta, Saint Louis, Sullivan, Columbia, and Washington 105 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 109 expected. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-092115- /O.NEW.KLSX.HT.Y.0007.260809T1700Z-260813T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Vandalia, Quincy, Bowling Green, Litchfield, Salem, Hannibal, Pittsfield, Mount Sterling, Farmington, Mexico, and Centralia 105 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 106 expected. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRB Action: Continued Issued At: 2026-08-09 15:06:23 197 WWUS73 KLSX 092006 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 306 PM CDT Sun Aug 9 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-101115- /O.CON.KLSX.XH.W.0003.000000T0000Z-260813T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Edwardsville, Alton, Belleville, Sullivan, Washington, Columbia, Chester, Jefferson City, Fulton, Saint Charles, Cahokia, Saint Louis, Union, and Sparta 306 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 110. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-101115- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260813T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Farmington, Mount Sterling, Centralia, Quincy, Vandalia, Hannibal, Bowling Green, Pittsfield, Mexico, Salem, and Litchfield 306 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 107. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Carney Action: Continued Issued At: 2026-08-10 01:49:13 182 WWUS73 KLSX 100648 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 148 AM CDT Mon Aug 10 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-102200- /O.CON.KLSX.XH.W.0003.000000T0000Z-260813T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Sullivan, Saint Louis, Chester, Sparta, Alton, Saint Charles, Union, Columbia, Edwardsville, Fulton, Belleville, Washington, Jefferson City, and Cahokia 148 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-102200- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260813T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Pittsfield, Litchfield, Bowling Green, Mexico, Farmington, Vandalia, Centralia, Salem, Hannibal, Quincy, and Mount Sterling 148 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 108. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRB Action: Continued Issued At: 2026-08-10 14:44:24 836 WWUS73 KLSX 101943 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 243 PM CDT Mon Aug 10 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-111045- /O.CON.KLSX.XH.W.0003.000000T0000Z-260813T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Louis, Sparta, Union, Cahokia, Edwardsville, Jefferson City, Chester, Columbia, Saint Charles, Washington, Sullivan, Alton, Fulton, and Belleville 243 PM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 110. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-111045- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260813T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Pittsfield, Litchfield, Farmington, Bowling Green, Salem, Mexico, Hannibal, Centralia, Quincy, Vandalia, and Mount Sterling 243 PM CDT Mon Aug 10 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 108. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Gosselin Action: Continued Issued At: 2026-08-11 02:18:15 119 WWUS73 KLSX 110717 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 217 AM CDT Tue Aug 11 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-112230- /O.CON.KLSX.XH.W.0003.000000T0000Z-260813T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Washington, Columbia, Chester, Edwardsville, Sparta, Saint Charles, Belleville, Sullivan, Fulton, Jefferson City, Cahokia, Saint Louis, Union, and Alton 217 AM CDT Tue Aug 11 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-112230- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260813T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Bowling Green, Salem, Mexico, Centralia, Litchfield, Pittsfield, Hannibal, Vandalia, Quincy, Mount Sterling, and Farmington 217 AM CDT Tue Aug 11 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRB Action: Time Extended Issued At: 2026-08-12 01:46:08 278 WWUS73 KLSX 120645 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 145 AM CDT Wed Aug 12 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-122145- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260814T0100Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Sullivan, Sparta, Belleville, Chester, Alton, Edwardsville, Fulton, Union, Saint Louis, Columbia, Washington, Cahokia, Saint Charles, and Jefferson City 145 AM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 8 PM CDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-095>099-MOZ018-019-026-027-034>036-042-052- 072>075-084-085-099-122145- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Adams IL-Brown IL-Pike IL-Calhoun IL-Jersey IL-Knox MO-Lewis MO- Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Centralia, Bowling Green, Litchfield, Hannibal, Salem, Mount Sterling, Quincy, Pittsfield, Mexico, Vandalia, and Farmington 145 AM CDT Wed Aug 12 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until 8 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRB Action: Upgraded Issued At: 2026-08-12 13:15:20 079 WWUS73 KLSX 121814 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 114 PM CDT Wed Aug 12 2026 ILZ095>097-MOZ018-019-026-027-121915- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Including the cities of Hannibal, Mount Sterling, Pittsfield, and Quincy 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY IS CANCELLED... Clouds and rain has kept temperatures and heat index much cooler than earlier forecast day. Therefore, the heat advisory has been cancelled. $$ MOZ072>075-084-085-099-130915- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Farmington 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Crawford MO, Washington MO, Iron MO, Madison MO, Reynolds MO, Saint Francois MO, and Sainte Genevieve MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-130915- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Louis, Belleville, Chester, Alton, Cahokia, Union, Sparta, Washington, Saint Charles, Sullivan, Jefferson City, Fulton, Columbia, and Edwardsville 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-130915- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Mexico, Salem, Bowling Green, Centralia, Litchfield, and Vandalia 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Gosselin Action: Time Extended Issued At: 2026-08-12 13:15:20 079 WWUS73 KLSX 121814 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 114 PM CDT Wed Aug 12 2026 ILZ095>097-MOZ018-019-026-027-121915- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Including the cities of Hannibal, Mount Sterling, Pittsfield, and Quincy 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY IS CANCELLED... Clouds and rain has kept temperatures and heat index much cooler than earlier forecast day. Therefore, the heat advisory has been cancelled. $$ MOZ072>075-084-085-099-130915- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Farmington 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Crawford MO, Washington MO, Iron MO, Madison MO, Reynolds MO, Saint Francois MO, and Sainte Genevieve MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-130915- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Louis, Belleville, Chester, Alton, Cahokia, Union, Sparta, Washington, Saint Charles, Sullivan, Jefferson City, Fulton, Columbia, and Edwardsville 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-130915- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Mexico, Salem, Bowling Green, Centralia, Litchfield, and Vandalia 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Gosselin Action: Cancelled Issued At: 2026-08-12 13:15:20 079 WWUS73 KLSX 121814 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 114 PM CDT Wed Aug 12 2026 ILZ095>097-MOZ018-019-026-027-121915- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Including the cities of Hannibal, Mount Sterling, Pittsfield, and Quincy 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY IS CANCELLED... Clouds and rain has kept temperatures and heat index much cooler than earlier forecast day. Therefore, the heat advisory has been cancelled. $$ MOZ072>075-084-085-099-130915- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260814T0100Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Farmington 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Crawford MO, Washington MO, Iron MO, Madison MO, Reynolds MO, Saint Francois MO, and Sainte Genevieve MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-130915- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Louis, Belleville, Chester, Alton, Cahokia, Union, Sparta, Washington, Saint Charles, Sullivan, Jefferson City, Fulton, Columbia, and Edwardsville 114 PM CDT Wed Aug 12 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-130915- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Mexico, Salem, Bowling Green, Centralia, Litchfield, and Vandalia 114 PM CDT Wed Aug 12 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Gosselin Action: Continued Issued At: 2026-08-13 03:34:33 987 WWUS73 KLSX 130834 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 334 AM CDT Thu Aug 13 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 132345- /O.CON.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Chester, Sparta, Saint Charles, Saint Louis, Columbia, Fulton, Union, Edwardsville, Washington, Alton, Sullivan, Belleville, Farmington, Jefferson City, and Cahokia 334 AM CDT Thu Aug 13 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 113. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. && $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-132345- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Salem, Centralia, Mexico, Vandalia, Litchfield, and Bowling Green 334 AM CDT Thu Aug 13 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRB Action: Continued Issued At: 2026-08-13 10:28:45 697 WWUS73 KLSX 131528 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO Issued by National Weather Service Paducah KY 1028 AM CDT Thu Aug 13 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 140300- /O.CON.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Saint Charles, Columbia, Belleville, Edwardsville, Jefferson City, Saint Louis, Farmington, Fulton, Alton, Sullivan, Chester, Washington, Sparta, Cahokia, and Union 1028 AM CDT Thu Aug 13 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 113. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. $$ ILZ097-MOZ026-027-140300- /O.EXA.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Pike IL-Shelby MO-Marion MO- Including the cities of Hannibal and Pittsfield 1028 AM CDT Thu Aug 13 2026 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...In Illinois, Pike IL County. In Missouri, Marion MO and Shelby MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-140300- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Salem, Litchfield, Mexico, Centralia, Vandalia, and Bowling Green 1028 AM CDT Thu Aug 13 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 108. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. $$ JGG Action: Area Extended Issued At: 2026-08-13 10:28:45 697 WWUS73 KLSX 131528 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO Issued by National Weather Service Paducah KY 1028 AM CDT Thu Aug 13 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 140300- /O.CON.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Saint Charles, Columbia, Belleville, Edwardsville, Jefferson City, Saint Louis, Farmington, Fulton, Alton, Sullivan, Chester, Washington, Sparta, Cahokia, and Union 1028 AM CDT Thu Aug 13 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 113. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. $$ ILZ097-MOZ026-027-140300- /O.EXA.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Pike IL-Shelby MO-Marion MO- Including the cities of Hannibal and Pittsfield 1028 AM CDT Thu Aug 13 2026 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...In Illinois, Pike IL County. In Missouri, Marion MO and Shelby MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. $$ ILZ058>060-064-065-070-098-099-MOZ034>036-042-052-140300- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO- Lincoln MO- Including the cities of Salem, Litchfield, Mexico, Centralia, Vandalia, and Bowling Green 1028 AM CDT Thu Aug 13 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 108. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. $$ JGG Action: Continued Issued At: 2026-08-14 04:03:34 837 WWUS73 KLSX 140903 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 403 AM CDT Fri Aug 14 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 150015- /O.CON.KLSX.XH.W.0003.000000T0000Z-260816T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Saint Louis, Cahokia, Chester, Union, Saint Charles, Washington, Sparta, Belleville, Edwardsville, Fulton, Farmington, Columbia, Sullivan, Jefferson City, and Alton 403 AM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Dangerously hot conditions with heat index values up to 112. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-070-097>099-MOZ026-027-034>036-042-052-150015- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL- Pike IL-Calhoun IL-Jersey IL-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Litchfield, Pittsfield, Bowling Green, Mexico, Salem, Centralia, Hannibal, and Vandalia 403 AM CDT Fri Aug 14 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 109. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ BRC Action: Time Extended Issued At: 2026-08-14 13:21:05 096 WWUS73 KLSX 141820 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 120 PM CDT Fri Aug 14 2026 ILZ070-150930- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Salem and Centralia 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 150930- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Chester, Belleville, Jefferson City, Fulton, Alton, Cahokia, Edwardsville, Union, Sullivan, Sparta, Farmington, Saint Louis, Columbia, Saint Charles, and Washington 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-097>099-MOZ035-036-042-052-150930- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Pike IL- Calhoun IL-Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Pittsfield, Litchfield, Mexico, Vandalia, and Bowling Green 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 105. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ026-027-034-150930- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO-Monroe MO- Including the cities of Hannibal 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 105. * WHERE...Marion MO, Monroe MO, and Shelby MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH Action: Upgraded Issued At: 2026-08-14 13:21:05 096 WWUS73 KLSX 141820 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 120 PM CDT Fri Aug 14 2026 ILZ070-150930- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Salem and Centralia 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 150930- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Chester, Belleville, Jefferson City, Fulton, Alton, Cahokia, Edwardsville, Union, Sullivan, Sparta, Farmington, Saint Louis, Columbia, Saint Charles, and Washington 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-097>099-MOZ035-036-042-052-150930- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Pike IL- Calhoun IL-Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Pittsfield, Litchfield, Mexico, Vandalia, and Bowling Green 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 105. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ026-027-034-150930- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO-Monroe MO- Including the cities of Hannibal 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 105. * WHERE...Marion MO, Monroe MO, and Shelby MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH Action: Continued Issued At: 2026-08-14 13:21:05 096 WWUS73 KLSX 141820 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 120 PM CDT Fri Aug 14 2026 ILZ070-150930- /O.UPG.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ /O.EXB.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Salem and Centralia 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 107. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 150930- /O.EXT.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Chester, Belleville, Jefferson City, Fulton, Alton, Cahokia, Edwardsville, Union, Sullivan, Sparta, Farmington, Saint Louis, Columbia, Saint Charles, and Washington 120 PM CDT Fri Aug 14 2026 ...EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-097>099-MOZ035-036-042-052-150930- /O.EXT.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Pike IL- Calhoun IL-Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Pittsfield, Litchfield, Mexico, Vandalia, and Bowling Green 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 105. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ026-027-034-150930- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO-Monroe MO- Including the cities of Hannibal 120 PM CDT Fri Aug 14 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SATURDAY... * WHAT...Heat index values up to 105. * WHERE...Marion MO, Monroe MO, and Shelby MO Counties. * WHEN...Until 9 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH Action: Cancelled Issued At: 2026-08-15 01:37:11 120 WWUS73 KLSX 150636 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 136 AM CDT Sat Aug 15 2026 ILZ097-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Pike IL- Including the cities of Pittsfield 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ MOZ026-027-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO- Including the cities of Hannibal 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Jefferson City, Washington, Alton, Saint Charles, Columbia, Farmington, Belleville, Edwardsville, Chester, Cahokia, Sparta, Union, Sullivan, Saint Louis, and Fulton 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Litchfield, Vandalia, Bowling Green, and Mexico 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ BRC Action: Continued Issued At: 2026-08-15 01:37:11 120 WWUS73 KLSX 150636 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 136 AM CDT Sat Aug 15 2026 ILZ097-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Pike IL- Including the cities of Pittsfield 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ MOZ026-027-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO- Including the cities of Hannibal 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Jefferson City, Washington, Alton, Saint Charles, Columbia, Farmington, Belleville, Edwardsville, Chester, Cahokia, Sparta, Union, Sullivan, Saint Louis, and Fulton 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Litchfield, Vandalia, Bowling Green, and Mexico 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ BRC Action: Cancelled Issued At: 2026-08-15 01:37:11 120 WWUS73 KLSX 150636 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 136 AM CDT Sat Aug 15 2026 ILZ097-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Pike IL- Including the cities of Pittsfield 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ MOZ026-027-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO- Including the cities of Hannibal 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Jefferson City, Washington, Alton, Saint Charles, Columbia, Farmington, Belleville, Edwardsville, Chester, Cahokia, Sparta, Union, Sullivan, Saint Louis, and Fulton 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Litchfield, Vandalia, Bowling Green, and Mexico 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ BRC Action: Continued Issued At: 2026-08-15 01:37:11 120 WWUS73 KLSX 150636 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 136 AM CDT Sat Aug 15 2026 ILZ097-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Pike IL- Including the cities of Pittsfield 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ MOZ026-027-150745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Shelby MO-Marion MO- Including the cities of Hannibal 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today or Sunday, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Jefferson City, Washington, Alton, Saint Charles, Columbia, Farmington, Belleville, Edwardsville, Chester, Cahokia, Sparta, Union, Sullivan, Saint Louis, and Fulton 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-152145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 136 AM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Litchfield, Vandalia, Bowling Green, and Mexico 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-152145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 136 AM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ BRC Action: Continued Issued At: 2026-08-15 13:58:23 778 WWUS73 KLSX 151858 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 158 PM CDT Sat Aug 15 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 161200- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Sullivan, Sparta, Alton, Saint Louis, Washington, Cahokia, Fulton, Columbia, Edwardsville, Chester, Union, Farmington, Saint Charles, Belleville, and Jefferson City 158 PM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-161200- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 158 PM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 106. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-161200- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Vandalia, Bowling Green, Mexico, and Litchfield 158 PM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 105. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-160200- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 158 PM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 102. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Elmore Action: Continued Issued At: 2026-08-15 13:58:23 778 WWUS73 KLSX 151858 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 158 PM CDT Sat Aug 15 2026 ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 161200- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Sullivan, Sparta, Alton, Saint Louis, Washington, Cahokia, Fulton, Columbia, Edwardsville, Chester, Union, Farmington, Saint Charles, Belleville, and Jefferson City 158 PM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 109. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-161200- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 158 PM CDT Sat Aug 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 106. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ058>060-064-065-098-099-MOZ035-036-042-052-161200- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Ralls MO-Pike MO-Audrain MO-Lincoln MO- Including the cities of Vandalia, Bowling Green, Mexico, and Litchfield 158 PM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT SUNDAY... * WHAT...Heat index values up to 105. * WHERE...Portions of south central and southwest Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ MOZ034-160200- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260816T0200Z/ Monroe MO- 158 PM CDT Sat Aug 15 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 102. * WHERE...Monroe MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Elmore Action: Cancelled Issued At: 2026-08-16 01:37:43 981 WWUS73 KLSX 160637 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO Issued by National Weather Service Kansas City/Pleasant Hill MO 137 AM CDT Sun Aug 16 2026 MOZ035-036-042-160745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Ralls MO-Pike MO-Audrain MO- Including the cities of Bowling Green and Mexico 137 AM CDT Sun Aug 16 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 162145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Washington, Cahokia, Chester, Sullivan, Sparta, Columbia, Jefferson City, Farmington, Edwardsville, Belleville, Saint Louis, Union, Alton, Saint Charles, and Fulton 137 AM CDT Sun Aug 16 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 110 degrees. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-162145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 137 AM CDT Sun Aug 16 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 110 degrees. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ058>060-064-065-098-099-MOZ052-162145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Lincoln MO- Including the cities of Litchfield and Vandalia 137 AM CDT Sun Aug 16 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 degrees are expected. * WHERE...In Illinois, Bond IL, Fayette IL, Montgomery IL, Calhoun IL, Greene IL, Jersey IL, and Macoupin IL Counties. In Missouri, Lincoln MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ Action: Continued Issued At: 2026-08-16 01:37:43 981 WWUS73 KLSX 160637 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO Issued by National Weather Service Kansas City/Pleasant Hill MO 137 AM CDT Sun Aug 16 2026 MOZ035-036-042-160745- /O.CAN.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Ralls MO-Pike MO-Audrain MO- Including the cities of Bowling Green and Mexico 137 AM CDT Sun Aug 16 2026 ...HEAT ADVISORY IS CANCELLED... Heat index values are not expected to exceed 100 degrees in these areas today, and as such, the Heat Advisory has been cancelled. $$ ILZ069-074-079-100>102-MOZ041-047>051-059>065-072>075-084-085-099- 162145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Clinton IL-Washington IL-Randolph IL-Madison IL-Saint Clair IL- Monroe IL-Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Washington, Cahokia, Chester, Sullivan, Sparta, Columbia, Jefferson City, Farmington, Edwardsville, Belleville, Saint Louis, Union, Alton, Saint Charles, and Fulton 137 AM CDT Sun Aug 16 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 110 degrees. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ILZ070-162145- /O.CON.KLSX.XH.W.0003.000000T0000Z-260817T0200Z/ Marion IL- Including the cities of Centralia and Salem 137 AM CDT Sun Aug 16 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 110 degrees. * WHERE...Marion IL County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ058>060-064-065-098-099-MOZ052-162145- /O.CON.KLSX.HT.Y.0007.000000T0000Z-260817T0200Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Calhoun IL- Jersey IL-Lincoln MO- Including the cities of Litchfield and Vandalia 137 AM CDT Sun Aug 16 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 degrees are expected. * WHERE...In Illinois, Bond IL, Fayette IL, Montgomery IL, Calhoun IL, Greene IL, Jersey IL, and Macoupin IL Counties. In Missouri, Lincoln MO County. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||