The threat from a wildfire near Canada's oil sands hub of Fort McMurray, Alberta, appeared to be easing on Wednesday, a day after it forced thousands of residents to evacuate and stirred memories of a damaging blaze nearly a decade earlier.
Favorable winds were expected to push the fire away from the city of about 68,000 in northwest Canada, where many residents earn a paycheck from the nearby oil industry. The Fort McMurray fire comes as Canada is just entering a new fire season after last year's record number of wildfires sent choking smoke across parts of the U.S. and forced more than 235,000 Canadians to evacuate their communities.
But scientists have said it's not clear that wildfire smoke will be the same problem it was last year, when unusual weather patterns drove the haze southward.
In Fort McMurray, about 6,600 residents fled parts of the city's southern end while others were on on alert. It was familiar terrain for the Albertan city, which survived a catastrophic blaze in 2016 that destroyed 2,400 homes and forced more than 80,000 people to flee.
Jay Telegdi, who lost his home to that wildfire, watched from his balcony on Tuesday as the sky over downtown turned orange and black. It ''burned your eyes'' to walk outside, Telegdi said in a phone interview, adding that it was slightly easier to breathe on Wednesday.
''You can grow accustomed to it,'' said Telegdi, who works for the Athabasca Chipewyan First Nation. ''We've come to accept columns of smoke blocking out the whole sky and yet we're still drilling for oil.''
Canada is the world's fourth-largest producer of oil and fifth-largest producer of gas, a reality that sits uncomfortably with the nation's pledges to protect biodiversity and lead the global fight against climate change. When burned, oil and gas release heat-trapping carbon dioxide into the atmosphere, intensifying the very conditions that help wildfires scorch millions of acres.
In Canada last year, they burned an area larger than New York state, releasing nearly three times the emissions produced by the country's entire economy in a year, and sending hazardous air to U.S. cities thousands of miles away. No civilians died, but at least four firefighters died.