Hundreds of wildfires in Canada are creating unhealthy air quality conditions across the Midwest, including Michigan, where some areas ranked among the worst air quality in the world Monday.

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.

Midwest and Northeast regions in the U.S. are seeing poor air quality from Canadian wildfires. See the map showing where the wildfires burn.