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

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air.

Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.

Minneapolis and Chicago are again atop the world rankings for worst air quality as northerly winds continue to push Canadian ...

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

Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

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

A detailed view of the sun covered by smoke from the Canadian wildfires as air quality alerts were issued across Minnesota ...

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

An air quality alert covering the entire state of Minnesota continues on Thursday, marring otherwise fairly ideal weather ...

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

Smoke from Canadian wildfires settled over Chicago Thursday, with air quality reaching “unhealthy” levels for everyone. Air ...