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A wildfire in British Columbia on July 2, 2021, one of more than 170 blazes fueled by a record-smashing heat wave© BC Wildfire Service/AFP - The World Weather Attribution group said that global warming, caused by greenhouse gas emissions, made the heat wave at least 150 times more likely to happen. Pacific Northwest areas of the two countries saw temperatures that broke records by several degrees, including a Canadian record of 49.6 degrees Celsius in the village of Lytton, which was subsequently mostly destroyed in a wildfire. “There’s absolutely no doubt that climate change played a key role here,” Friederike...