Smoke from the more than 700 wildfires burning in Canada is continuing to blanket parts of the Midwest for a final day.

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

Air quality will deteriorate across 12 states through Saturday, mainly in the Upper Midwest, as wildfire smoke pours into the ...

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

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

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

Wildfire smoke from Canada turned Chicago into one of the world’s most polluted metro areas as the Lollapalooza music ...

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

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

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

Smoke from Canadian wildfires continues to choke the skies over the Upper Midwest this weekend, with the milky haze even ...

Wildfire smoke from Canada and the western US has drifted over the Great Lakes, causing hazardous air quality in Chicago, ...