The Minnesota Pollution Control Agency said Wednesday that raging wildfires in Canada are causing elevated levels of pollution across the state.
WDIO reports dozens of wildfires are burning across northwestern Ontario, the largest blaze is estimated to have burned more than 44 square miles.
The Associated Press reports that no air quality warnings have been issued yet, but indexes in the Twin Cities and Rochester are in the moderate range, which can still affect sensitive individuals.
Satellite images show smoke covering much of the state. Hazy skies and isolated areas of dense smoke are expected through Friday evening.