Maps show where new plumes of smoke will cause hazy skies through the end of the week. Low-level smoke is forecast to spread eastward Wednesday across the Appalachians and into the Mid-Atlantic and Northeast.

The Minnesota Pollution Control Agency (MPCA) has issued an air quality alert for a wide range of central and southern Minnesota due to the continuing wildfires in Canada.

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