BISMARCK, N.D. — Much of the Upper Midwest was dealing with swaths of unhealthy air this past weekend because of drifting smoke from Canadian wildfires. It's covering the northern region of the United States at a time when people want to be enjoying lakes, trails and the great outdoors.
Canadian wildfire smoke returns to Wisconsin
In the Corn Belt region, such as near Columbus, Wisconsin, noticeable levels of smoke in the air during summer and fall have now become commonplace. Wildfire smoke is often most noticeable in the evenings, with hazy red sunsets resulting from the filtering of sunlight through the particulate matter suspended in the atmosphere.





