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, ...

National Weather Service officials called an air quality alert in effect until midnight as well as a beach hazard warning.

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

Smoke from wildfires blazing across Canada is once again wafting over huge portions of the U.S. Midwest and worsening air ...

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.

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

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

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 ...