Americans are facing hazardous conditions this summer, with authorities urging residents to remain indoors

Wildfires in Canada are pouring thick clouds of smoke into the US and will usher in unhealthy air quality for millions of people in Northeast and Midwest.

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, exposing millions of…

States warned residents about air quality issues that could last for days

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.

Around 100 million Americans could be affected by the wildfire smoke, though impacts will vary by location

Millions of Americans face air quality alerts from Minnesota to New York as authorities urge people to stay indoors

Climate change means bad air pollution, wildfires, and extreme heat are all happening at once. Here's what to know and how to stay safe.

NEW YORK (AP) — Heavy, pungent smoke from Canadian wildfires darkened skies in the U.S. on Thursday, from the Great Lakes to parts of the East Coast, reducing visibility for

Air quality levels in Chicago, Detroitt and New York reached dangerously high levels on Tuesday as the US cities were shrouded in smoke produced by wildfires raging through…

The Manhattan skyline was obscured by thick haze and Chicago closed its beaches Thursday as out-of-control Canadian wildfires raged, sending smoke spewing into the United States…

A wave of toxic air flowing in from Canada to the US has transformed three major cities into the most unbreathable places on Earth.

"Controlled burns + thinning + clearing debris would go a long way in preventing this from happening every summer."

A think blanket of hazardous wildfire smoke spread from the Great Lakes to the East Coast on Thursday, putting millions of Americans at health risk.

Heavy, pungent wildfire smoke darkens skies in the US from the Great Lakes to parts of the East Coast, reducing visibility and prompting warnings that breathing the air outside…

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

US states near the Canadian border including Minnesota, Wisconsin, Michigan and Illinois were particularly choked, while the Northeast including New York was also experiencing…

Heavy smoke from more than 800 wildfires burning across Canada enveloped a swath of the US from the Midwest to the Northeast on Thursday.

A health emergency has erupted in the northern US as multiple cities see their air quality become the worst in the world due to the Canadian wildfires raging out of control.

Over 120 million people were at risk of dangerous air quality

Here's how a heat dome, dry conditions and shifting winds are helping toxic wildfire smoke travel hundreds of miles and linger over millions of Americans.