Canadian wildfire smoke blankets parts of U.S. as others face severe heat and storms

NEW YORK, June 28 (Xinhua) -- Millions of people across the United States woke up to severe weather on Wednesday, with parts of the country smothered by smoke from Canadian wildfires, while others face stifling heat and severe storms.

Around 87 million people are at risk for poor air quality due to smoke from the Canadian wildfires, with Detroit, Chicago and Minneapolis among the top four cities with the worst air quality in the world, according to the tracking service IQAir.com.