US Republicans are threatening to sanction Canada and its government officials after smoke from devastating wildfires drifted across large parts of the United States, creating hazardous air quality for tens of millions of Americans. President Donald Trump blamed Canada for the smoke and said he planned to call Prime Minister Mark Carney to discuss Ottawa's fire management plans.
Trump Demands Tariffs Over Smoke
In a post on Truth Social, Trump wrote that the US had been “invaded” by dirty air and that “the cost of this pollution must of necessity be added to the TARIFFS Canada is currently paying.” His comments came after Senator Bernie Moreno of Ohio announced he would introduce a bill to sanction Canada and Canadian officials, accusing the government of failing to invest in wildfire prevention methods such as forest thinning, fuel reduction, prescribed burns, and stronger enforcement against arson.
Four Republican House members from Michigan also wrote to Carney, warning: “If Canada will not manage its forests to prevent these fires, the United States will look elsewhere, and act on our own, to protect our people.” Ohio and Michigan share borders with the Canadian province of Ontario.
Canada Responds: Climate Action Needed
Carney responded by stating, “Fighting climate change is the responsibility of all countries, including the United States.” Ontario Premier Doug Ford suggested the US could offer more aid rather than complain, noting that Canada has previously helped its neighbor during wildfires.
Fires are also burning across the US. According to the National Interagency Fire Center, more than 5,740 square miles have burned so far this year—31% more than the 10-year average to this date. The average amount of US land burned annually in the 2020s is more than double that of 30 years ago. In northern Minnesota, over 63,000 acres have burned, and wildfires in Oregon, Washington, and Idaho have contributed to smoke drifting north into Canada.
Canadian Wildfires: Scale and Impact
Canada's largest fire, near Ontario's remote Wabakimi Provincial Park, spans 787,802 acres (318,812 hectares). As of Friday morning, 191 out-of-control and large fires were burning. Thousands of people in Ontario have been evacuated, and at least one First Nations community has been destroyed. Toronto experienced the worst air quality in the world on Wednesday amid a record-breaking heatwave. Nearly 6 million acres have burned in Canada, less than a quarter of the land consumed when Canadian wildfire smoke last blanketed the US in 2023.
Climate Context and US Policy
The planet's warming climate, driven by human activities, is causing hotter, drier summers that amplify wildfire activity, making extreme fires more intense, frequent, and larger. The wildfire season is also lengthening. The US is the world's largest oil and gas producer and historically the largest emitter of greenhouse gases, making it a key driver of climate change.
Under Trump, the administration has rolled back climate policies, bolstered fossil fuels, and targeted renewable energy. It has suppressed climate research, dismantled agencies through mass firings, and moved to shutter government labs studying wildfire impacts on health and ecosystems. Scientists warned in May that these actions could hinder efforts to protect people and the environment from wildfires as soon as this summer.
Air Quality Crisis Across US
On Friday, about 109 million people were affected by poor air quality across the Midwest, mid-Atlantic, and Northeast. Smoke blanketed Chicago and Detroit, where the air quality index reached a “hazardous” 361, according to AirNow. Baltimore and Washington DC recorded “very unhealthy” readings of 281 and 247, respectively. New York City’s air quality was “unhealthy” at 184 early Friday, improving to 124 later. Philadelphia and Cleveland had “very unhealthy” readings around 260, while parts of Michigan, Minnesota, and Wisconsin recorded “hazardous” levels.
Organizers of the World Cup final in East Rutherford, New Jersey, are monitoring smoke patterns, as smoke currently over the mid-Atlantic is expected to blow back into the Northeast. Wildfire smoke kills tens of thousands of people each year, affecting nearly every system in the human body.
