Smoke From 800+ Canadian Wildfires Chokes 100 Million Americans as Air Quality Hits 'Dangerous' Levels
More than 100 million people across the United States and Canada are under air quality alerts as smoke from over 800 active wildfires in Canada drifts south, blanketing major cities from the Midwest to the Northeast in hazardous haze.
A thick cloud of smoke from hundreds of wildfires burning across Canada has swept into the United States, triggering air quality alerts in at least 17 states and creating dangerous breathing conditions for tens of millions of people [197529][198090]. Canada currently has 858 active fires, with the most intense blazes in northwestern Ontario producing massive smoke columns that have crossed the border [198090]. The smoke first hit Minnesota, Wisconsin, and Michigan before moving east and south, now reaching New York, Boston, Buffalo, Philadelphia, Detroit, Milwaukee, and Green Bay [198090]. Officials expect conditions to worsen in Cleveland, Columbus, Baltimore, and Washington, D.C. [198090].
The US Air Quality Index has rated conditions as "dangerous" across large parts of Michigan and Minnesota [198090]. Toronto recorded the worst air quality in the world on Thursday, according to Swiss monitoring firm IQAir, while Chicago, Detroit, and New York also ranked among the five most polluted cities globally [198090]. Health authorities are urging residents to stay indoors, keep windows closed, use air purifiers, and wear N95 masks when going outside [197529][198090]. The pollution poses serious risks especially for children, the elderly, and those with respiratory conditions [197529].
The warning comes just days before the World Cup final between Spain and Argentina, scheduled for Sunday at New Jersey's MetLife Stadium [198183]. No restrictions for the event have been announced so far [198090]. Ontario has requested federal help to evacuate residents from remote northern communities as wildfires continue to rage [197967]. While Canada's wildfire activity this year remains below the record levels of 2023, the combination of fires in Ontario and a heat dome over the central US is trapping smoke and pushing it south [198090]. The smoke is expected to linger for several more days, depending on wind patterns [198055].