On Friday, July 17, U.S. President Trump threatened to impose tariffs on Canada, accusing the Canadian government of failing to manage forests properly and allowing wildfire smoke to drift into the United States. Trump stated that Canada had not maintained forests or cleared debris, resulting in "dirty, polluted and unhealthy air" entering American territory and causing hazardous air quality across the Midwest and Eastern Seaboard.
Trump said he planned to call Canadian Prime Minister Mark Carney on Friday to discuss measures Canada would take. He indicated that pollution costs from Canadian wildfires, which cause billions of dollars in annual damage to the United States, must be added to existing tariffs. Canada's federal wildfire center reported 897 active fires as of Friday, with over 12 U.S. states issuing air quality alerts. New York City's air quality index reached unhealthy levels, ranking the city fourth worst globally on Friday morning.