Air quality in the Chicago area has remained poor for three days in a row, the NBC 5 Storm Team reported Wednesday morning.

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

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 ...

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

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

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

The air quality is poor today in northern Illinois due to migrating Canadian wildfire smoke. See the AQI in your area.

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

Chicago faces a heat wave with poor air quality due to wildfire smoke and ozone; temperatures may hit mid-90s.

An air quality alert was in effect for the Chicago area and northwest Indiana Tuesday as poor air quality from unhealthy, elevated ozone and lingering wildfire smoke continues. According to the ...

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