Maps show wildfire smoke forecast, air quality alerts due to pollution from Canadian, Minnesota fires

Maps show wildfire smoke forecast, air quality alerts due to pollution from Canadian, Minnesota fires
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Heavy smoke from wildfires blazing in Canada and Minnesota engulfed large swaths of the Midwest and Northeast U.S. this week, impacting air quality and exposing millions of people to hazardous levels of air pollution. Conditions across the Northeast were expected to improve on Saturday, while smoky