Smoke from wildfires in Canada moved into the Chicago area Friday evening. Doctors are warning people about the potential dangers of being outside this weekend.

Canadian wildfire smoke expected to drift into US and harm air quality two years after New York engulfed by smog - Forecasters in multiple northern states have warned of potential travel and health ef

States across the border issued air advisories about particulate pollution that are expected to last for several days.

Multiple fires remain uncontained in Saskatchewan and Manitoba, provinces just north of Minnesota and North Dakota. Thousands have been ordered to evacuate, and wind is blowing the smoke south.

The wildfire smoke will likely mean poor air quality for much of the state, according to the Wisconsin Department of Natural Resources.

An unwanted guest makes a return to northeast Indiana and northwest Ohio on Friday… Canadian wildfire smoke is set to track back into the area. The s

University of Utah researchers used their Salt Lake City campus as lab to determine how much outdoor particulate pollution affects indoor air quality. Their study concluded pollution from inversion and dust events is kept out of buildings,

As anyone who was around two years ago will remember, this is not the first time a hazy, unhealthy back of air engulfed and choked Chicago.