Trump threatens new Canada tariffs over wildfire smoke in US cities
Donald Trump threatened to impose new tariffs on Canada in response to wildfires sending smoke into the United States, accusing the country of "willful negligence" in forest management. Trump said on Truth Social that he would call Canadian Prime Minister Mark Carney to demand an explanation, describing the air reaching US cities as "filthy, polluted, and unhealthy." As of Saturday, approximately 955 fires were actively burning across Canada, with more than 190 in Ontario alone, many out of control.
Canadian officials rejected Trump's characterization and outlined their response to the crisis. Prime Minister Carney stated that climate change is "everyone's responsibility, truly everyone's, including the United States," and noted that Canada has invested approximately C$12 billion in forest sustainability and fire prevention. Ontario Premier Doug Ford called Trump's rhetoric "a shame" and "unacceptable," noting that Canada has previously assisted the US with California wildfires and hurricane response, and that Michigan and Massachusetts have already offered water bombers and firefighters to help battle the blazes.
Scientists disputed the premise of Trump's complaint, explaining that wildfire impacts transcend borders and are driven partly by climate change. Dr. Patrick James from the University of Toronto stated that weather patterns do not respect international boundaries, and smoke from major US wildfires has affected Canada in previous years. Dr. Anabela Bonada from the University of Waterloo emphasized that "climate change is a global issue, and it would be inaccurate to suggest that Canada alone caused or could have prevented these wildfires," noting that sustained heat at the end of June combined with below-average rainfall contributed to rapid fire increases.
The smoke has caused widespread disruption across the northern United States, with air quality in Detroit ranked worst in the world and hazardous conditions affecting Minnesota, Michigan, Pennsylvania, Ohio, and New York. Outdoor events have been cancelled, flights delayed, and communities advised to remain indoors. US lawmakers from affected districts issued an open letter accusing Canada of chronic under-investment in forest management and claiming that "American lungs are paying the price for Canadian inaction, year after year," though their demands for direct US involvement in Canadian wildfire operations conflict with established cross-border cooperation agreements dating to 1982.
Trump's threat follows a pattern of trade tensions with Canada, which has endured tariffs over the past year after decades of duty-free trade without achieving a new agreement. Some Republicans have used the wildfire issue to renew calls for Trump's recurring proposal to make Canada a US state, while others suggested delaying the opening of the Gordie Howe International Bridge, a Canada-funded infrastructure project connecting Ontario to Michigan. Trump has previously eliminated federal climate endangerment findings that would have regulated greenhouse gases, contradicting the scientific consensus that climate change drives increasingly severe wildfire seasons.