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.

Hazy skies from wildfire smoke from Canada, which may become more concentrated with visibility potentially dropping to 3-5 ...

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

Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of ...