At least two tornadoes — but likely more — touched down in Wisconsin on Wednesday, the National Weather Service said.

Most of Minnesota and parts of Montana, North Dakota and Wisconsin were ranked “unhealthy” for air quality on a U.S. Environmental Protection Agency map.

Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air due to drifting smoke from Canadian wildfires, covering the northern region of the U.S. at a ...