Canadian wildfire smoke returned to Wisconsin this weekend, with unhealthy levels for people with asthma and heart disease.

A fire near the Grand Canyon National Park in Arizona has grown more than 20 times in size in 24 hours as an intensifying ...

Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian ...

Most of Minnesota and parts of Montana, North Dakota and Wisconsin were ranked “unhealthy” for air quality on a U.S. Environmental Protection Agency map.

Continued drifting of wildfire smoke from Canada and Alaska has prompted Bay Area air regulators to extend an air quality advisory through Monday.

Wildfires are forecast to expand through the summer in Western Canada and parts of the north.

Wildfire smoke returns, hazing skies and raising air quality concerns for outdoor activities.

MINNEAPOLIS (AP) — Smoke from Canadian wildfires carried another day of poor air quality south of the border to the Midwest, where conditions in parts of Minnesota, Wisconsin and Michigan were ...

You’re not imagining that campfire smell — thick smoke from Canadian wildfires has settled over Minnesota again, with air ...

Experts say the whole state is impacted, with unhealthy air in northeastern Minnesota, including the North Shore and northern Wisconsin.

KSTP FORECAST FIRST ALERT TODAY FOR TWIN CITIES/WESTERN WISCONSIN BECAUSE OF CANADIAN WILDFIRE SMOKE PRODUCING UNHEALTHY ...