Iowa, Illinois Severe Extreme Heat Warning | Effective 06/27/2026 23:21

Headline: 
Extreme Heat Warning issued June 28 at 1:21AM CDT until June 30 at 9:00PM CDT by NWS Quad Cities IA IL
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
June 27, 2026 - 11:21pm
Expires: 
June 28, 2026 - 7:30am
Description: 
* WHAT...Dangerously hot conditions with heat index values exceeding 100 degrees multiple days. * WHERE...Portions of north central and northwest Illinois and east central and northeast Iowa. * WHEN...From noon Monday to 9 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...There is the possibility that excessive heat will last for much of next week. Thunderstorms and associated cloud debris may interrupt the excessive heat at times late in the week.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
Buchanan; Delaware; Dubuque; Jones; Jackson; Clinton; Jo Daviess; Stephenson; Carroll; Whiteside; Henry; Bureau; Putnam
Forcast Office: 
NWS Quad Cities IA IL