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 ...

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

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.

Wildfires continue to burn in Canada, and the smoke is filling communities there and towns across the U.S. border.

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

An air quality alert in effect for northwest and north central Minnesota could extend into the weekend as wildfire smoke ...

Wildfire smoke from Canada is forcing the Minnesota Pollution Control Agency to extend an air quality alert through Monday.

Canadian wildfire smoke causes dangerous air quality in 12 Midwest states. Health alerts urge 22 million residents to stay indoors as PM2.5 levels soar.

U.S. Rep. Brad Finstad, who represents Minnesota's First Congressional District, co-led a letter to Canada's ambassador to ...

Wisconsin, Minnesota Republicans demand to know what Canada is doing to curb wildfire smoke The lawmakers said successive years of wildfires in Canada have undermined air quality in their states ...