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

The poor air quality continues to prevail in Illinois as Canadian wildfire smoke migrates south into the U.S. As a result, ...

Good afternoon, Chicago. Air quality alerts issued today in Illinois because of Canadian wildfire smoke marked the latest ...

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

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, ...

Every air quality monitor in Minnesota is reporting red or unhealthy conditions for everyone, an official said.

While the haze slightly lifted Saturday morning, air quality levels are expected to worsen across the Chicago area over the ...

An Illinois Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate ...

Most of the Chicago area remains under an Air Quality Alert this weekend due to smoke from Canadian wildfires.

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 ...

Chicago had the worst air quality in the world for a few hours Thursday, thanks to smoke from Canadian wildfires.