Canadian wildfire smoke has become so intense that even young, healthy Minnesotans are experiencing symptoms similar to ...

An air quality index of 300 or higher is considered hazardous, and the record-breaking smoke AQI in Grand Portage reached 800 ...

From Sunday to Tuesday, smoke in northwest Canada swirled into the northern Plains, giving Minnesota some of the worst air ...

The smell of fire filled the air as thick smoke from wildfires in Canada blanketed part of the Midwest and created hazardous ...

The Minnesota Pollution Control Agency issued an air quality alert for much of state through Wednesday as smoke from ...

The Minnesota Pollution Control Agency (MPCA) issued an air quality alert starting at 1 p.m. Thursday, extending to 7 p.m.

The Minnesota Pollution Control Agency (MPCA) has issued an air quality alert for areas in northern Minnesota.

The U.S. Environmental Protection Agency warns that wildfire smoke contains dangerous pollutants in the form of fine ...

Minnesota authorities warned of unhealthy levels of exposure to particles from wildfires. Symptoms include shortness of ...

Tracking how that smoke will move from Canada, or when it's going to cause problems at the surface, isn't easy.

Smoke will clear northwest Minnesota early Tuesday morning and air quality will begin to improve from northwest to southeast ...

An air quality map shows conditions improving in the U.S. Friday as smoke from the Canadian wildfires subsides.