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

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

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

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

The hazy air hovering over US cities, including Chicago and New York, this summer is reminding Americans of just how ...

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

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

"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.

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

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.

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

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.