Extreme Heat Warning issued July 27 at 1:43AM CDT until July 27 at 9:00PM CDT by NWS St Louis MO
Event: Extreme Heat Warning
Desc: * WHAT...Dangerously hot conditions with heat index values up to 113.
* WHERE...Portions of south central, southwest, and west central
Illinois and central, east central, northeast, and southeast
Missouri.
* WHEN...Until 9 PM CDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and...
Areas: Greene County IL, Macoupin County IL, Montgomery County IL, Bond County IL, Fayette County IL, Clinton County IL, Marion County IL, Washington County IL, Randolph County IL, Adams County IL, Brown County IL, Pike County IL, Calhoun County IL, Jersey County IL, Knox County MO, Lewis County MO, Shelby County MO, Marion County MO, Monroe County MO, Ralls County MO, Pike County MO, Boone County MO, Audrain County MO, Moniteau County MO, Cole County MO, Osage County MO, Callaway County MO, Montgomery County MO, Lincoln County MO, Gasconade County MO, Warren County MO, Franklin County MO, Crawford County MO, Washington County MO, St. Francois County MO, Ste. Genevieve County MO, Iron County MO, Madison County MO, Reynolds County MO
Effective: Sunday, July 26, 2026 - 23:43
Expires: Monday, July 27, 2026 - 14:45
