Smoke From Canadian Wildfires Reaches Over 20 U.S. States

On July 16, 2026, smoke from almost 850 Canadian wildfires — over 180 in northern Ontario — spread into the U.S., prompting air quality warnings in more than 20 states from Minnesota to North Carolina. Toronto's air briefly ranked among the world's worst on July 15. Winds carrying tiny, harmful pollution particles southeast are affecting millions.