Trump threatens Canada tariffs as wildfire smoke chokes US cities

President Donald Trump threatened new tariffs on Canadian goods after smoke from hundreds of wildfires in Ontario spread across the northern United States, triggering air quality warnings and indoor-stay advice in several states. Trump accused Canada of failing to control the fires and said he spoke with Prime Minister Mark Carney about the smoke during the FIFA World Cup final in New Jersey. Canadian officials have defended their response, citing firefighting agreements with the US, more than 5,300 personnel deployed and investments in forest sustainability and fire prevention. Government data cited by the reports said roughly 2.4 million hectares have burned this season, while experts say hotter, drier conditions linked to climate change are worsening wildfire risk.