This smoky blanket owes its existence to the raging wildfires in the western U.S. and Canada, which have been spewing volumes ...

How thick or long-lasting the smoke may be is unclear, although there are already some hints of it in southern Canada and the northern tier of the United States. In addition to the fires in Canada ...

Wildfires, like this one in British Columbia's Tweedsmuir Provincial Park, continue to burn in Canada. Smoke from Canada's wildfires has again blanketed swathes of the US, leaving tens of millions ...

Wildfires have sparked in parts of Canada and the Western U.S., due to ongoing drought and last week’s record heat. Smoke from these large wildfires can be lofted thousands of feet into the air.