Smoke from enormous wildfires in the western United States and Canada is causing haze in Oak Ridge and across the eastern United States, and affecting air quality in many regions.

On Thursday, CBS News reported that there are wildfires burning in 13 states, and 83 large fires have burned close to 1.3 million acres. The largest fire, the Bootleg Fire in Oregon, was burning more than 476 square miles, an area about the size of Los Angeles and three times the size of Detroit.

Smoke from the wildfires is blowing into Canada and then south around the Great Lakes and east to the East Coast, according to a map posted by AirNow.gov and shared by the National Weather Service in Morristown.

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