Heat advisory issued for Chicago with temperatures reaching 100-110°F
A heat advisory has been issued for Chicago and surrounding areas, effective from noon to 9 p.m. on Tuesday, 1 September 2026. The National Weather Service forecasts heat indices ranging between 100°F and 110°F, with temperatures expected to reach the low 90s. High humidity levels are also anticipated, which may exacerbate the heat's impact. There is a 20% chance of showers and thunderstorms later in the morning, which could mitigate the extreme temperatures. Current conditions at O’Hare International Airport are mostly cloudy with a temperature of 93°F, while similar conditions are reported at Midway Airport.