Heat Advisory

Locations Affected

Chicago, IL ∙ Naperville, IL ∙ Aurora, IL ∙ Joliet, IL ∙ Rockford, IL ∙ Elgin, IL ∙ Waukegan, IL ∙ Cicero, IL ∙ Schaumburg, IL ∙ Palatine, IL

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Chicago IL 335 PM CDT Wed Jul 23 2025 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THURSDAY... * WHAT...Peak afternoon heat index values of 100 to 105 expected. * WHERE...Central Cook, Northern Cook, and Southern Cook Counties. * WHEN...Until 10 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Heat indices will remain in the 90s through the evening hours, only falling below 90 degrees for a few hours late tonight into early Thursday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Residents of the city of Chicago can call 3 1 1 to access city services, including seeking well being checks and for the location of the nearest cooling center.

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