Watch: Wildfire Smoke Spreads Across Eastern U.S.
Wall Street Journal
The National Weather Service said millions of people were under air-quality alerts as more than 400 wildfires in Canada sent smoke billowing across the eastern half of the U.S.
https://www.wsj.com/articles/watch-canadian-wildfire-smoke-spreads-across-eastern-u-s-f1b64e0b