An Air Pollution Action Day was called Wednesday morning for the Chicago area and is in effect until midnight, weather ...

An air quality alert is in effect until midnight Thursday for the Chicago area as Canadian wildfires continue.

Smoke coming in from Canadian wildfires settled over Chicago, causing unhealthy air quality conditions for at-risk groups.

Smoke from Canadian wildfires continues to plague the Upper Midwest and Great Lakes region, with multiple states under air ...

Chicago’s air took a hit overnight as smoke from more than 100 Canadian wildfires drifted into the city, pushing the air ...

An air quality alert remains in effect for the entire Chicago area, with another "Air Pollution Action Day" alert declared as ...

An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

An Air Quality Alert is in effect as Canadian wildfire smoke has been blown in behind a slow-moving rain system and cold ...

An air quality alert has been extended for the Chicago area as "unhealthy" levels are expected to continue into the start of ...

Smoke from Canadian wildfires triggered an air quality alert Thursday across northeast Illinois, meaning conditions are ...

Illinois environmental officials are warning residents about air quality concerns as wildfire smoke from Canada persists in ...