Canadian Wildfire Smoke Blankets U.S. East Coast, Worsening Air Quality.

Smoke from wildfires in Canada is affecting air quality in parts of the Northeastern United States, with air quality health advisories in effect for much of New York, Maryland, St. Louis, Philadelphia, and Delaware. Satellite images show thick smoke blanketing the region, with the National Weather Service warning people to monitor their local air quality forecasts before spending time outdoors. The dip in air quality comes as more than 100 wildfires continue to burn across the Canadian border in Quebec and Ottawa, with strong winds directing heavy smoke through the Northeast until at least Wednesday.