Ontario requested federal assistance to evacuate people from remote northern Canadian communities ravaged by wildfires, as smoke brought poor air quality to Toronto and much of the Northeastern US.

There are more than 830 wildfires in Canada as of Wednesday morning.

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

A massive plume of smoke from wildfires burning across Canada has swept into the United States, degrading air quality across the Midwest, Northeast and Mid-Atlantic.

Environment Canada has issued health warnings after sky over city turns yellow

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.

The smoke from the wildfires in northern Ontario is expected to linger around until Friday. Check where and how it's moving here.

Residents have been warned to stay indoors to avoid both the smoke and the extreme heat

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…

More than 830 wildfires were burning in Canada on Wednesday, along with more than a dozen in northern Minnesota, forcing mandatory evacuations.

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

A thick orange haze hung over Toronto on Wednesday 15 July as smoke from wildfires in northwestern Ontario engulfed Canada's largest city, giving it the worst air quality of any…

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.

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Monitor ranks Toronto as having the worst air quality on earth, surpassing Kinshasa, DR Congo, and New Delhi, India.

Rangers estimated anywhere from 6,000 to 10,000 people were inside the 1.1-million-acre (445,000-hectare) wilderness. | World News

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…

Toronto recorded among the worst air quality of all major cities worldwide on Wednesday as thick smoke from wildfires in Ontario blanketed its skyline and drifted into the US,…