More than 100 active wildfires are currently burning in northern Ontario, Canada, sending thick smoke into the atmosphere that has reached Toronto. On Wednesday, July 15, 2026, Toronto's air quality was ranked the worst in the world as the city became shrouded in smoke. Authorities have urged residents to remain indoors due to the significant drop in air quality, which has also triggered allergic reactions among many people.

The ongoing wildfires in northern Ontario continue to pose a serious environmental and public health challenge as smoke spreads over populated areas.

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