Heat waves fueled by climate change fueled more than 100 wildfires across Ontario and northern Minnesota.

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.

Wildfires in Canada and Minnesota are sending heavy smoke to the Midwest and Northeast U.S., causing poor air quality alerts.

Over 100 wildfires are burning in Canada, with winds carrying the smoke southeast. Warnings about unhealthy air extend from Minnesota through Toronto and into New York.

Warnings about dangerous, unhealthy air extended Wednesday from Minnesota through Toronto and into New York.

Warnings about dangerous, unhealthy air extended Wednesday from Minnesota through Toronto and into New York.

TORONTO/NEW YORK: Toronto’s air quality ranked the worst among major cities globally on Wednesday as wildfire smoke from northwestern Ontario blackened skies and spread into the…

Roughly 100 wildfires are raging out of control in Ontario, sending smoke streaming more than 1,000 miles from their origin.

Fires in parts of Canada are blanketing several cities with smoke. Experts recommend limiting time outside, purifying indoor air and wearing a respirator if outside.

Wildfire smoke is dense enough in a handful of states that experts recommend masks for those who can’t stay indoors.

Massive plumes of Canadian wildfire smoke have started to pour over the border into the United States, bringing dangerous air quality to more than 100 million people in the…

Wondering why it smells like smoke outside? Canadian wildfires are impacting millions in Ontario, Minnesota, Toronto, New York, Michigan, Wisconsin and Boston.

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

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…

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…

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