Cook County is under a heat watch through Thursday evening. Temperatures could feel like 105-110 degrees Wednesday.

The building heat and humidity comes as Chicago's air quality readings early Monday morning were "unhealthy for sensitive groups," the website AirNow.gov said. The air quality ranked as a level three ...

The 'unhealthy for sensitive groups' air quality in Chicago comes as an air quality alert was issued for the entire state of ...

Chicago faces an extreme heat watch with temperatures expected to reach mid-90s and heat indexes up to 115 degrees.

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

Chicago faces poor air quality and sweltering heat today and tomorrow, followed by scattered storms heading into the weekend.

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday, July 15. Here's what to know ...

CHICAGO - Today is warm with an air quality alert in effect. Sensitive groups should take it easy again as we have elevated ...

Besides temperatures feeling in the high 90s, Chicago and surrounding areas are under an air quality alert until midnight, ...

The National Weather Service has issued an air quality alert for parts of the Midwest including the Chicago area as unhealthy smoke from Canadian wildfires continues to move south. The alert, issued ...

The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

The AQI in hazy Chicago reached 250 on Tuesday afternoon. Any number over 100 is considered unhealthy for sensitive groups. Haze obscures the Chicago skyline, June 27, 2023.