Illinois, Missouri Severe Extreme Heat Warning | Effective 07/28/2026 11:52

Headline: 
Extreme Heat Warning issued July 28 at 1:52PM CDT until July 28 at 7:00PM CDT by NWS St Louis MO
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
July 28, 2026 - 11:52am
Expires: 
July 28, 2026 - 5:00pm
Description: 
* WHAT...Dangerously hot conditions with heat index values up to 105. * WHERE...In Illinois, Washington IL and Randolph IL Counties. In Missouri, Crawford MO, Washington MO, Iron MO, Madison MO, Reynolds MO, Saint Francois MO, and Sainte Genevieve MO Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Instruction: 
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.
Area Description: 
Washington; Randolph; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov