Unhealthy smoke from Canadian wildfires blankets the Upper Midwest when people want to be outside Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting ...

Unhealthy air has invaded Minnesota, Wisconsin and North Dakota early this week as a new round of wildfire smoke from Canada has wafted into the region, choking out areas as far south as Chicago ...

Air quality recap: Wildfire smoke causes dangerous air quality in Toronto and southern Ontario Environment Canada is encouraging people to limit time outdoors amid poor air quality that could ...

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating maps! New data arrives every 30 minutes.