One climatologist said "a perfect storm" of climate extremes primed the western U.S. for one of its worst fire seasons in a decade. Meanwhile, Canadian wildfire smoke fills the air.

Over 800 wildfires are burning through forests in Canada, prompting heavy smoke warnings for millions of Americans.

Heavy smoke from several large wildfires blazing in Canada and Minnesota is expected to engulf large swaths of the Midwest and Northeast U.S. this week.

Over 830 wildfires burn across Canada, with many classified as out of control. Thick smoke blankets parts of Canada and the United States, affecting air quality. Officials warn of…

Hundreds of fires are burning out of control, and several factors could help bring more smoke to the U.S. for days or even weeks to come.

One climatologist said "a perfect storm" of climate extremes primed the western U.S. for one of its worst fire seasons in a decade. Meanwhile, Canadian wildfire smoke fills the…

A stalled high pressure, drought across North America and a smoke-bearing jet stream converged into the continent's most extreme weather week in years. | World News

An eerie haze was cast across areas of the US following over 800 wildfires ravaging Canada. The smoke culminated in a daunting circle above eastern Canada and parts of the…

Over 120 million people were at risk of dangerous air quality