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

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

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

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian ...

Chicago's Air Quality Alert continues due to Canadian wildfire smoke, with health advisories for sensitive groups amidst ...

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

The hazy skies in the Chicago area are the visible sign of the poor air quality Thursday as smoke from Canadian wildfires ...

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

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

An Air Quality Alert was still in effect for a third straight day, but for a smaller portion of the Chicago area.

While air quality was in the "unhealthy for sensitive groups" category in Chicago, it was even worse in some suburbs.