Illinois Severe Extreme Heat Watch | Effective 06/28/2026 00:47

Headline: 
Extreme Heat Watch issued June 28 at 2:47AM CDT until July 1 at 10:00PM CDT by NWS Chicago IL
Event: 
Extreme Heat Watch
Urgency: 
Future
Effective: 
June 28, 2026 - 12:47am
Expires: 
June 28, 2026 - 11:00am
Description: 
* WHAT...Dangerously hot conditions with heat index values around 105 possible each afternoon. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...From Monday afternoon through Wednesday 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. 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