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

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

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

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

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

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

CHICAGO (WLS) -- Air Quality Alerts remain in effect for the Chicago area Friday due to smoke from Canadian wildfires.

Illinois residents are urged to reduce pollution levels. The air quality is expected to improve by Saturday, according to the ...

Wildfire smoke drifting across the Great Lakes has caused air quality to plunge to hazardous levels in several states, ...

Health officials from Minnesota to Maine have issued alerts warning of poor air quality from wildfires burning in Canada.

Several wildfires burning across the northwestern Canadian provinces are again sending vast amounts of smoke into the upper Midwest and northeastern US, swamping the area with unhealthy air quality – ...

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