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

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

Wildfire smoke brings hazy skies and poor air quality to Chicago today, with hot and humid weather building into the weekend.

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

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

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

"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at ...

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

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

The hazy skies in the Chicago area are the visible sign of the poor air quality on Thursday as smoke from Canadian wildfires ...

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

Wildfire smoke from Canada is a problem again in the Chicago area, with an air quality alert in place now extended through Wednesday night.