A number of states in the United States have declared air quality warnings with concerning levels noted across many of the ...

Wildfire smoke is wrecking air quality in places across the U.S. amid a one-two punch of fires in the West and in Canada, which has sent smoke pouring across large sections of the country ...

As Canada grapples with one of its worst wildfire seasons on record, smoke from the blazes have prompted air quality alerts across the U.S.