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

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

CHICAGO - An Air Quality Alert is in effect until midnight Wednesday night for the following counties: McHenry, Lake (IL), ...

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

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

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

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

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

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

An air quality alert covering the entire state of Minnesota continues on Thursday, marring otherwise fairly ideal weather ...

An air quality alert in the Chicago area has been extended for another day as Canadian wildfire smoke continues to plague the ...

CHICAGO (WLS) -- An air quality alert has been extended for part of the Chicago area through Thursday. The alert for McHenry, Lake, Kane, DuPage, Kendall, Grundy, Cook and Will counties in Illinois ...