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

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

A stretch of hot, dry weather is expected to build through the end of the week. CHICAGO - Not only has wildfire smoke been a respiratory irritant for the past several days, it has also held ...

The Chicago area has experienced several days of pleasant temperatures, but the mercury will be trending upward again in ...

Smoke from the more than 700 wildfires burning in Canada is continuing to blanket parts of the Midwest for a final day.

Chicago will see cooler, clearer weather through the weekend, with mild temperatures and some lingering wildfire smoke.

Smoke has continued to cloud Illinois' air for a second straight day, but the poor air quality isn't because of a fire in the ...

Interim CTA President Nora Leerhsen on Wednesday faced questions from members of the Chicago City Council who are seeking to ...