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

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

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

Wildfire smoke drifting across the Great Lakes has caused air quality to plunge to hazardous levels in several states, ...

Wildfire smoke from Canada turned Chicago into one of the world’s most polluted metro areas as the Lollapalooza music ...

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

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 ...

As Canadian wildfire smoke lingers in the skies, the Chicago area will soon be under an air quality alert, but the smoke ...

Air Quality Alerts remain in effect for the Chicago area Friday due to smoke from Canadian wildfires. ABC7 Accuweather ...

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

The public is advised to take precautions, especially those sensitive to polluted conditions, by limiting their time outside and keeping windows and doors closed.

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