Iowa, Illinois Severe Extreme Heat Warning | Effective 06/30/2026 09:35

Headline: 
Extreme Heat Warning issued June 30 at 11:35AM CDT until July 1 at 10:00PM CDT by NWS Quad Cities IA IL
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
June 30, 2026 - 9:35am
Expires: 
June 30, 2026 - 5:45pm
Description: 
* WHAT...Dangerously hot and humid conditions with multiple days of heat index values of 100 to 110 expected, along with nighttime lows not falling below the mid to upper 70s. * WHERE...In Illinois, Carroll, Jo Daviess, and Stephenson Counties. In Iowa, Benton, Jackson, Jones, Linn, Buchanan, Delaware, and Dubuque Counties. * WHEN...Until 10 PM CDT Wednesday. * 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Area Description: 
Buchanan; Delaware; Dubuque; Benton; Linn; Jones; Jackson; Jo Daviess; Stephenson; Carroll
Forcast Office: 
NWS Quad Cities IA IL