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

CHICAGO - It's another day of poor air quality across the Chicago region with temperatures set to warm up. Fox 32 ...

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states ...

The public is advised to take precautions, especially those sensitive to polluted conditions, by limiting their time outside ...

Air quality has taken a serious hit across the United States as a two-fold blow of wildfires in the West and in Canada have ...

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

Wildfire smoke has pushed Chicago's air quality into the "unhealthy" zone. It's so bad, in fact, that we're the most polluted ...

While air quality was in the "unhealthy for sensitive groups" category in Chicago, it was even worse in some suburbs.

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

Smoke from Canadian wildfires continues to affect air quality across the Midwest, though Monday’s conditions were an ...

Most of the Chicago area remains under an Air Quality Alert this weekend due to smoke from Canadian wildfires.

Chicago air quality remains poor Friday thanks to Canadian wildfire smoke. An Air Quality Alert remains in place as events including Lollapalooza and Fiesta del Sol enter their second day.