WorldAir quality plummets in 20 states as Canadian wildfire smoke spreads across the US

Smoke from wildfires in south-central Canada and parts of Minnesota is moving across the United States. Air quality alerts have been issued in more than 20 states, affecting millions of Americans from Minnesota to New York, while authorities urge people to stay indoors. Unhealthy conditions are expected to persist this week. Smoke from more than 180 active fires in northern Ontario briefly left Toronto with air quality ranked among the worst in the world, before haze spread across several US states.

Canadian wildfiresair qualitysmoke pollution

TThe Guardian★★★★☆2026-07-16 14:49Original