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.

From British Columbia to the Northwest Territories and all the way east to New Brunswick, air quality alerts have been issued ...

The Department of Environmental Protection (DEP) has issued an air quality warning for Monday in parts of northeastern ...

By Mitch Klein, Feven Gerezgiher and Juan Del Valle As result of severe wildfires in Canada, Minnesota is facing the longest air quality alert on record since the Minnesota Pollution Control Agency ...

Step outside and you'll probably smell it—smoke has been a major issue across much of Eastern Canada this weekend. Montreal ...

"Wildfire smoke looks to persist throughout Michigan through at least Monday as winds shift," said state meteorologist Alec Kownacki.

The Pennsylvania Department of Environmental Protection declared a Code Orange Air Quality Action Day for particulate matter ...

Northern Minnesota tourism businesses are expressing relief as wildfire smoke starts to clear out of the region.

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

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