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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 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||