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

The alert comes as humidity is expected to increase Tuesday, with high temperatures in the mid 80s to low 90s, with heat ...

The building heat and humidity comes as Chicago's air quality readings early Monday morning were "unhealthy for sensitive ...

An Air Quality Alert has been issued through Tuesday for the Chicago area from wildfire smoke coming in from Canada.

CHICAGO (WLS) -- An air quality alert was extended through Wednesday by the National Weather Service for the Chicago area.

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

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

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

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

Haze from Canadian wildfires blankets the Chicago skyline on June 6. On Monday, smoke from wildfires in Manitoba pushed Chicago’s air-quality index for ozone to 156. Levels above 100 are ...

An Air Quality Alert has been extended through Wednesday night for the Chicago area from wildfire smoke coming in from Canada.