New measurements demonstrate that smoke particles in the upper atmosphere are twice the size of lower-altitude ones.

Across the western U.S., wildfires and the dangerous smoke that results have increased in frequency and intensity since the ...

New research shows climate change is now a major driver of wildfire smoke, affecting air quality and health across the western United States.

This story is updated to reflect the current wildfire smoke conditions in the U.S. The original story was published Jan. 8, 2025. Smoke from the Bear Gulch fire in Olympic National Park drifted ...

Smoke from wildfires burning in Canada is expected to cast a haze over the skies — and diminish air quality — in parts of the U.S. over the coming days.

The hazy air hovering over US metropolises, including Chicago and New York, this summer is reminding Americans of just how connected they are with their northern neighbor, regardless of how much ...

Eric Risberg / AP Wildfire has long been a part of life for many Americans. But recently, as wildfires have become larger, more destructive and longer-lasting, a new risk has come into focus for ...

Minnesota is under yet another air quality alert Monday, as smoke from Canadian wildfires pushes into the state. Homeowners know the saying, "water finds a way." Add wildfire smoke to that distinction ...

Let's be honest: This smoke is getting ridiculous, and we're all sick of it. But why does this keep happening? I have answers for this, some of which you won't like, but this is the reality of our ...

We now live in the Pyrocene, a proposed new geologic epoch of high wildfire activity brought about by human-caused climate change. The occurrence of extreme fire weather is now roughly double compared ...

People play rugby in the hazy weather on July 27 in New York City. There are currently smoke advisories across the Midwest and Northeast as a result of wildfires in Canada. Alejandra Borunda (she/her) ...