Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials issued an air pollution "action day" on Thursday.

Chicago and Detroit held the top two rankings for worst air quality in the world, according to IQAir’s Air Quality Index. The two Midwest metropolitans alternated between the "unhealthy" and ...

CHICAGO (CBS)-- Smoke pouring down from Canadian wildfires has created air quality so bad that Chicago's was deemed the worst on Earth Tuesday. Shortly before noon, the poor quality of air in the ...

Chicago's poor air quality issues have persisted since Tuesday, when the city ranked in the No. 1 spot for the worst air quality in the world, according to the World Air Quality Index.

Why is it smoky in Chicago today? Wildfires are to blame for the city's air quality - among the worst in the world Tuesday. Check our map for updates.

The entire Chicago area was under an air quality alert once again Monday, leading many to question what behind the hay skies and "unhealthy" conditions? The answer is Canadian wildfires. Stream ...

Chicago air quality today is at unhealthy levels as smoke from Canadian wildfires moves through the area, which could cause health issues. Chicago had the worst air quality of any major city in ...

According to the monitoring site IQAir, Chicago had the worst air quality in the United States and ranked second out of 95 cities worldwide Wednesday. It ranked No. 1 on the global site Tuesday.

In February, the Illinois EPA found that the Chicago metropolitan area hadn’t met the Biden-era federal air quality standards from 2021 to 2023, the most recent three years of data.

The readings arrived just as the American Lung Association issued its annual State of the Air report, which suggests that even days with good air quality in Chicago may be hard on the lungs.It ...

The air quality in Chicago has just been ranked as one of the worst in the U.S. According to the American Lung Association. Written by Christina Izzo Thursday April 24 2025. Share.

For at least one day, Chicago had the worst air quality among big cities across the world Tuesday. The smoke billowing from the Canadian wildfires made Chicago’s air worse than what’s breathed ...