An Illinois Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups (USG ...

Air quality alerts issued Thursday in Illinois because of Canadian wildfire smoke marked the latest bout in an increasingly common summer occurrence. The alert covers 34 Illinois counties designated ...

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

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

While an air quality alert continues for parts of the Midwest due to smoke from Canadian wildfires, northeastern Illinois was ...

Smoke from Canadian wildfires has returned to Central Illinois bringing significant reductions in air quality to Central Illinois. Air Quality Alerts have been issued for much of the state through ...

The National Weather Service has opted to extend an air quality alert in the Chicago area for another day.

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

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

Chicago is under an Air Quality Alert today because of wildfire smoke. Officials recommend reducing outdoor activity and checking on those most at risk. CHICAGO - Chicago's air quality reached an ...

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

The four-day music festival is taking place downtown as Chicago remains under an Air Quality Alert. On Saturday, the skyline looked a little clearer than the last few days.