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

Millions of Canadians were warned to limit their time outdoors on Sunday with wildfire smoke hanging in the air from B.C. to ...

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.

The Iowa Department of Natural Resources reported Friday that air quality in Iowa will be at levels “unhealthy for sensitive ...

Environment Canada issues a special air quality weather statement on Sunday afternoon that also includes the Haldimand, ...

The area reached the “very unhealthy” purple-colored range after being in the “unhealthy” red-colored range on the AirNow.gov website while the Packers took part in a 2-plus-hour practice outside on ...