National Weather Service officials called an air quality alert in effect until midnight as well as a beach hazard warning.

According to the National Weather Service, the air quality alert remains in effect through midnight in parts of the Chicago ...

Concern for poor air quality in the greater Chicago area remains as the Illinois EPA extends its alert until Thursday night.

National Weather Service officials issued an air quality alert set to expire at midnight Saturday for the Chicago and ...

While the haze slightly lifted Saturday morning, air quality levels are expected to worsen across the Chicago area over the ...

The alert was also issued because of unhealthy ozone levels in addition to the smoke particles. The Chicago area has been ...

Chicago's Air Quality Alert continues due to Canadian wildfire smoke, with health advisories for sensitive groups amidst ...

Chicago faces an air quality alert due to Canadian wildfire smoke and high ozone levels, with risks for sensitive groups.

By 3 p.m. Thursday, Chicago was overtaken in its title for worst air quality by the city of Kinshasa in the Democratic Republic of Congo.

Wildfire smoke has pushed Chicago's air quality into the "unhealthy" zone. It's so bad, in fact, that we're the most polluted city in the world right now. Here's what you should know.

Chicago will see near-90 temperatures, high humidity, and poor air quality today, with storm chances returning tonight.

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian ...