Canada’s record-breaking wildfire season has taken a deadly turn after two firefighters were killed days apart, prompting a broader reckoning over the mounting economic and human toll of the unprecedented blazes that have charred swaths of the country’s boreal forests. …With almost 900 fires burning, nearly 70 million people could once again experience poor air quality in parts of the northern US and as far south as Alabama. In Canada, the focus has shifted to a pair of wildfire fighters killed while battling blazes, rare fatalities that have left exhausted crews in mourning. …fatalities are relatively rare within wildfire crews, and the two deaths have rattled crews. …the fires have halted oil and gas production in Alberta and burned through valuable timber stands across the country. …Derek Nighbor, head of the Forest Products Association of Canada, said the “impact is significant”, with mills temporarily shutting down. …Montreal-based Resolute Forest Products warning 2023 was “shaping up to be the worst year in over three decades”.