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

As wildfires continue to rage in western Canada, the Environmental Protection Agency issued its first alert of the year for ...

Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials issued an 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 alert is in effect until midnight Thursday for the Chicago area as Canadian wildfires continue.

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

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

Hazy skies from fires are reminiscent of 2023 when Chicago was the second-most-polluted major city in the country.

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

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

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

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