Smoke produced by hundreds of wildfires burning across Canada has drifted thousands of miles and nearly circled the entire ...

In letters expressing outrage and indignation, Republican lawmakers are demanding more forest thinning, prescribed burns and ...

Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast ...

Canada's second-worst wildfire season on record has already burned 7.8 million hectares and could continue for weeks, federal ...

Canada is battling more than 700 active wildfires across the country, roughly two-thirds of which are burning out of control, ...

Degraded and/or unsafe air quality levels will continue across parts of Canada Monday as wildfire smoke lingers. However, the ...

Smoke from wildfires blazing across Canada is once again wafting over huge portions of the U.S. Midwest and worsening air ...

Canadian wildfires burning across northern Manitoba and Saskatchewan are sending smoke through central Canada, the Great ...

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air ...

Some Team P.E.I. athletes are back on the Island after taking part in the Canada Games, where their competition was ...

As Canada’s wildfire smoke creeps down into the U.S., it’s also transforming. Chemical reactions between gases and sunlight create ozone, which further exacerbates lung conditions like asthma.

This isn’t just a local story. Wildfire smoke from Canada is affecting major U.S. cities from New York to Minneapolis. And those most affected, of course, are in Canada.