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

A Chicago Air Quality Alert has been extended through Friday as smoke from Canada wildfires has pushed the AQI into unhealthy ...

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

Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials issued an air ...

Despite better air on Friday in Chicago, the city remains under an air quality alert. It remains among the most unhealthy in ...

Toxic air spreads hundreds or even thousands of miles from where wildfires burn. Last week, Chicago felt the sting—and ...

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

As of early Thursday, the air quality for much of northeast Illinois, including multiple suburbs to the north and some to the ...

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

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

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

Canadian wildfires brought some of the worst air quality in the world to Chicago last week. Since then, the AQI has gotten a ...