More than 100 Ontario wildfires push Toronto air quality to worst in world

Smoke from over 100 active wildfires in northern Ontario has made Toronto the worst air quality globally and blanketed the northeastern U.S. across more than 1,000 miles, prompting health warnings from Environment Canada.

First covered Jul 15, 2026 · 9:08 AM PT · 3 articles

More than 100 Ontario wildfires push Toronto air quality to worst in world — Image via theguardian.com

Coverage

20h via Bluesky Wildfire smoke blankets Toronto, turning skies orange and prompting air quality warning — An orange haze washed over Toronto’s skyline on Wednesday as wildfire smoke drifted into the region, leaving Toronto with some of the worst air quality in the…

21h Wired Science The Northeast Is Being Blanketed in Canadian Wildfire Smoke — Roughly 100 wildfires are raging out of control in Ontario, sending smoke streaming more than 1,000 miles from their origin.

1d Guardian Environment Wildfires in Ontario make Toronto air quality worst in world — Environment Canada has issued health warnings after sky over city turns yellow Smoke from more than 100 active wildfires in northern Ontario have made…

Related coverage

1d Heatmap News Orange Skies Are Back

More coverage from around the web

cbc.ca Toronto the orange: Wildfire smoke leaves city under dirty sky with no relief likely until Friday | CBC News

theglobeandmail.com Ontario wildfires trigger air quality warnings for Toronto, southern regions - The Globe and Mail

aljazeera.com Toronto engulfed by wildfire smoke as US cities threatened | Climate News | Al Jazeera

france24.com Canadian wildfire smoke pushes Toronto air quality to world's worst, reaches US - France 24

globalnews.ca Toronto’s skies turn orange as wildfire smoke settles in | Globalnews.ca

Appeared in: 2026-07-16 (#18)

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