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

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

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

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

The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

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

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

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

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

Chicago First Alert Weather: Nice start to the week 02:14. CHICAGO (CBS) -- An Air Quality Alert is in effect until midnight due to increased ozone pollution and wildfire smoke from Canada. CBS ...

The National Weather Service’s Chicago office attributed the alert to unhealthy ozone levels and lingering effects of smoke from wildfires in Canada.