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

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

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

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

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

Smoke from raging wildfires in Canada is causing air quality alerts to blanket the Midwest. Lissette Nuñez is live from ...

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

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

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

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

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

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