Hazardous Air From Wildfire Smoke Chokes Northeastern States
The northeastern U.S. experienced another day with some of the worst air quality recorded in the region, caused by large plumes of smoke emanating from widespread wildfires in Canada.
Thursday, the Canadian province of Quebec, where the wildfires broke out, reported 136 active fires that have charred an area approximately the size of Delaware.
Black carbon particles, or soot, have been moving across eastern portions of Canada and the U.S. from June 3.
Polluted air originated from a spike in wildfire activity in Quebec in early June. Then, a weather system pushed smoke from those blazes toward northeast and mid-Atlantic states, bringing hazardous air to densely populated regions of the U.S.