Illinois Severe Extreme Heat Warning | Effective 07/01/2026 13:09

Headline: 
Extreme Heat Warning issued July 1 at 3:09PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
July 1, 2026 - 1:09pm
Expires: 
July 1, 2026 - 11:15pm
Description: 
* WHAT...Dangerously hot conditions with peak afternoon heat index values of 100 to 105 degrees expected. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...Until midnight CDT Thursday Night. * IMPACTS...Heat related illnesses increase during heat waves.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. The magnitude of anticipated heat, combined with oppressive warmth at night will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. Residents of the city of Chicago can call 3 1 1 to request well being checks for elderly friends or family members, or for information on finding the nearest cooling center. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Area Description: 
Northern Cook; Central Cook; Southern Cook
Forcast Office: 
NWS Chicago IL