Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast ...

Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

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

The smoky air is predicted to reach New York City on Monday, and it could bring unhealthy air quality for sensitive groups.

Dangerous air quality will be a significant issue for millions of Americans to deal with early this week, as fires continue to spark throughout Canada.

Smoke from Canadian wildfires continues to affect air quality across the Midwest, though Monday’s conditions were an ...

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

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.

The smoke floating over the border shared between America and Canada is now impacting air quality in states as far south as ...

Air quality alerts from Canadian wildfire smoke spread to the Northeast on Sunday, stretching as far as northern Maine. It ...

Wildfire smoke from Canada is impacting millions of people across parts of the northern United States. Over the weekend, it ...