Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast into Tuesday.

She explained that air quality is largely influenced by wind patterns. With wildfires burning in central Canada, northwesterly winds are carrying smoke into the northeastern U.S., impacting air quality across several states. That's why we're seeing air quality health advisories—like the one issued today for fine particulate matter.

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, according to meteorologists.