Wildfire smoke from northwestern Ontario has pushed Toronto’s air quality to hazardous levels and spread into parts of the northeastern United States. Authorities issued health warnings as pollution reached very high-risk levels. Residents were advised to limit outdoor activities and reduce exposure to smoke.
Environment Canada reported an Air Quality Health Index reading of 10+, the highest risk category. Forecasts indicated poor air quality could continue through Thursday night. Although the fires remain far from major cities, smoke has travelled hundreds of miles across the region.
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Air quality alerts were also issued in New York and neighboring areas ahead of the FIFA World Cup final in New Jersey. Officials urged residents to avoid strenuous outdoor activity, especially vulnerable groups. Meteorologists warned that smoke could persist through the end of the week.
According to IQAir, Toronto recorded the worst air quality among major cities worldwide on Wednesday. More than 835 wildfires were active across Canada, with 112 classified as out of control. Authorities said nearly 1.9 million hectares had burned, mainly in Manitoba, Saskatchewan, and Ontario.
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The deteriorating air quality also disrupted public events, including the cancellation of Toronto’s FIFA Fan Festival. Experts warned that wildfire smoke and extreme heat may become more frequent because of changing climate conditions. Officials continue monitoring the fires and advising residents to take protective measures.