Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.  Air quality alerts were in effect Tuesday in several states, including Michigan and New York.

As Canada grapples with one of its worst wildfire seasons on record, smoke from the blazes have prompted air quality alerts across the U.S.

People may experience difficulty breathing and throat irritation as Canadian wildfire smoke causes air quality to deteriorate in the Midwest and Northeast.