The city is racing to put up 277 sensors. Once installed, Chicago will have the most high-quality air monitors in the country ...

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

The "unhealthy" air, which ranks as level four of six on the Air Quality Index, comes after multiple consecutive days of air quality alerts.

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 (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 ...

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

Illinois residents are urged to reduce pollution levels. The air quality is expected to improve by Saturday, according to the National Weather Service. Hannah Hudnall covers trending news for the USA ...

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

Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.