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

The ongoing Canadian wildfires have reportedly blanketed a third of the United States, affecting millions, with the National ...

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

Canada is having another bad wildfire season, and more than 27,000 people in three provinces have been forced to evacuate.

Smoke from Canadian wildfires continues to plague the Upper Midwest and Great Lakes region, with multiple states under air ...

Smoke from Canadian wildfires is beginning to worsen air quality in the eastern U.S. as several Midwestern states battle ...

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

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

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

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

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

MINNESOTA, USA — The smoke in the air on Tuesday was so thick you could see it and smell it. The Minnesota Pollution Control ...