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 ...

With hundreds of wildfires burning across Canada, smoke has drifted into the northern United States, lowering air quality ...

The Midwest saw some of the worst air quality conditions in the world Thursday, and similar conditions are expected to persist for several days.

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

Smokey Bear famously said, “Only you can prevent forest fires.” But because Canada has not put in an ounce of prevention — the smoke from its wildfires has invaded Michigan and ...

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

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

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

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

Heavy surface smoke from wildfires in Canada is drifting across Minnesota on Monday, with unhealthy air quality levels ...

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.