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 ...

Smoke from Canadian wildfires is expected to impact Michigan's summer air quality going forward, according to climatologist.

Like much of the U.S., Chicago was under a thick hazy blanket of wildfire smoke, creating dangerous conditions for anyone who ...

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

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

The true problem is the world’s climate is warming. Canadian forests are burning because they’ve been subjected to years of ...

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

"This" was a thick, glowing haze of smoke from fires hundreds of miles away in Canada. It made the air unhealthy to breathe, snarled air traffic and cast a surreal shadow over millions of residents.

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.

Smoke from Canada's wildfires is again drifting across large swaths of the United States, bringing air pollution and concerning air quality. Follow live updates.

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.