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Chicago weather
Archived — this story has rotated out of today’s deck. It is kept here in full.
The gist
Chicago endures fourth day of heat advisory with heat index up to 104 degrees. Officials warn of dangerous heat as thunderstorms expected Friday night.
Background
A prolonged heat wave has gripped the Chicago area, with heat advisories issued for multiple days. The National Weather Service forecasts high temperatures and humidity, making it feel like 104 degrees in some areas. A cold front is expected to bring some relief with thunderstorms.
How it unfolded
- Sep 1, 2026Temperatures hover in the upper-90s in the late afternoon in Chicago.
- Sep 2, 2026Heat advisory issued for second day; officials warn of dangerous heat.
- Sep 4, 2026Chicago under heat warning for fourth day; heat index could reach 104 degrees, with higher readings in Will and DuPage counties.
- Sep 4, 2026Forecast calls for thunderstorms Friday night, with temperatures lowering to low 70s.
Who’s saying what
- Officials
- Officials warn of dangerous heat and advise residents to take precautions.