PHILADELPHIA (CBS) -- Hard to believe it has been a year since Philadelphia took center stage as smoke from the Canadian wildfires left the city with the worst air quality on the planet for a day ...

It took several days for the dense smoke from the Quebec fires to reach US cities including New York, Philadelphia and Washington. In Quebec, smoke from wildfires across the region is now ...

From Maryland to the Canadian capital, a monstrous cloud of smoke spewed by Quebec’s wildfires has forced children to stay indoors, grounded flights in New York City and left millions of ...

It took several days for the dense smoke from the Quebec fires to reach US cities including New York, Philadelphia and Washington. In Quebec, smoke from wildfires across the region is now ...

Around 75 million people in the United States are experiencing dangerous air conditions because of smoke from wildfires raging across Canada, with officials urging them to limit time outdoors and ...

Smoke from the Canadian wildfires will be visible in the Philadelphia region on Tuesday, and an air quality alert has been issued for Wednesday in the Delaware Valley. More than 100 "out of ...

The smoke -- and fine particulate matter within it -- has billowed south from more than 100 fires burning in Quebec, bringing hazy skies and dangerous conditions that could affect the health of ...

Smoke from Canada's wildfires has been moving into the United States since last month. The most recent fires near Quebec have been burning for at least several days.

From Maryland to the Canadian capital, a monstrous cloud of smoke spewed by Quebec’s wildfires has forced children to stay indoors, grounded flights in New York City and left millions of ...