CHICAGO (WLS) -- An air quality alert was issued by the National Weather Service for the Chicago area. Chopper 7 captured as ...

CHICAGO - Today is warm with an air quality alert in effect. Sensitive groups should take it easy again as we have elevated ozone levels close to the ground. Highs will be around 90 this afternoon.

Officials have issued an air quality alert for around 10 million Americans, telling them to minimize outdoor activities and ...

Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

An air quality alert in the Chicago area will stretch into a third day as pollutants continue to linger in the air at high ...

Chicago's air quality alert continues due to Canadian wildfires, affecting sensitive groups and prompting health advisories.

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

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

It will be very warm and humid in Chicagoland on Tuesday, with lakeside highs in the upper 80s and inland highs in the 90s.

Air quality advisories have been issued for parts of Michigan, Illinois, Indiana, Minnesota, New York, Vermont and Colorado on Tuesday.