Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

The Midwest saw some of the worst air quality conditions in the world Thursday, and similar conditions are expected to persist for several days.

The elevated levels of fine particulate matter resulting from wildfire smoke could present significant health risks.

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Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian wildfires, covering the northern region o ...

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Air quality drops as Canadian wildfire smoke returns to Upper Midwest Multiple waves of Canadian wildfire smoke are moving through the Upper Midwest and Great Lakes early this week. Wisconsin and ...

BISMARCK, N.D. (AP) — Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian wildfires, covering the northern region of the U.S. at a ...

BISMARCK, N.D. — Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian wildfires, covering the northern region of the U.S. at a time ...

BISMARCK, N.D. (AP) -- 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 ...

Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian wildfires, covering the northern region of the U.S. at a time when people want… ...