Hazard Report Provided By forecast.weather.gov

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.

$$

Hazard Report Provided By forecast.weather.gov