Wildfire smoke from Canada shrouds eastern US, affecting 109 million people

Smoke from climate-driven Canadian wildfires has blanketed the Midwest and East Coast with hazardous air quality, with recent research suggesting wildfire pollution may cause twice as many deaths annually as heat waves.

First covered Jul 15, 2026 · 9:08 AM PT · 15 articles · no longer in the live window

Wildfire smoke from Canada shrouds eastern US, affecting 109 million people — Image via yaleclimateconnections.org

Coverage

70d Guardian Environment Flash flood warnings strike north-east US amid wildfire smoke from Canada — Poor air quality from wildfires continues to plague New York City as several neighborhoods hit by thunderstorms Saturday is delivering a double dose of…

71d Heatmap News What Worries Me Most About These Wildfire Smoke Days — When I woke up this morning in Chicago, the Air Quality Index was in the 300s, and I could barely see the top of the skyscraper across the street.

71d Inside Climate News Wildfire Smoke Chokes Eastern and Midwestern Cities as Air Pollution Soars to Dangerously High Levels — Smoke from climate change-fueled wildfires in Canada and northern Minnesota blanketed skies across much of the Midwest and East Coast, exposing millions of…

71d Heatmap News The East Coast’s New Forever Problem — Heat kills more Americans than any other extreme weather event in the United States. But wildfire smoke — while not strictly “weather” — appears to kill even…

71d Guardian Environment More Canadian wildfire smoke shrouds US midwest, mid-Atlantic and north-east — 109 million people face another day of poor air quality as smoke from blazes in Ontario drifts over the US

71d Wired Science What Cities From Chicago to Washington, DC, Look Like Under a Blanket of Wildfire Smoke — The US is home to some of the most polluted air on the planet as smoke from 120 out-of-control Canadian wildfires drifts across the border.

71d Yale Climate Connections Dangerous and historic wildfire smoke pollution event engulfs the U.S. and Canada — Most of the fires grew out of control under extreme heat conditions made up to five times more likely by climate change.

72d Heatmap News How Bad Is Exercising in Wildfire Smoke? — I became a runner in the spring of 2020. My run streak was my sourdough starter . Those were the Wild West days of respiratory spray warnings , when I’d get…

72d Heatmap News 5 Things to Keep in Mind When It’s Smoky Outside — If you live anywhere near the Great Lakes or Mid-Atlantic (or certain parts of the Mountain West), odds are it’s smoky where you live .

72d via Bluesky Cook County shatters air quality record, EPA data shows, as dangerous wildfire smoke envelops region — Residents warned to stay inside as fine particulate matter from wildfire smoke from Canada and Minnesota reaches hazardous levels.

73d 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…

73d 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.

73d Heatmap News Orange Skies Are Back — Before wildfire smoke turns the skies to a jaundiced yellow-gray, it might look almost pretty. Midday light grows diffuse, taking on a crepuscular golden hue.

73d 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…

Primary sources

nature.com Increasing frequency and intensity of the most extreme wildfires on Earth - Nature Ecology & Evolution — cited by 3 of the outlets above

nytimes.com Forest Fires Make The City Miserable Yellow Day Like That Of 1881 (nytimes.com) — cited by 2 of the outlets above

wxmortality.rcc-acis.org Mortality Estimation Tool — cited by 2 of the outlets above

Related coverage

71d Heatmap News What Worries Me Most About These Wildfire Smoke Days

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

Discussion

Bluesky: @akshatrathi.bsky.social Akshat Rathi · 72d ago · 119 ♥ We’re living in the everything is fine meme · @katharinehayhoe.com Katharine Hayhoe · 70d ago · 173 ♥ "The cost of climate-worsened wildfire smoke alone is larger than what earlier studies said every other estimated cost of climate change would be, combined." heatmap.news/daily/worryi... · @volts.wtf David Roberts · 70d ago · 158 ♥ We didn't previously integrate wildfire-smoke costs into the supposed cost of climate change for the US, and it turns out to be bigger than all those other costs combined. Oops! Gosh I wonder if we're underestimating anything else. Probably shoulda done something about this. · @leahstokes.bsky.social Leah Stokes · 70d ago · 158 ♥ We didn't previously integrate wildfire-smoke costs into the supposed cost of climate change for the US, and it turns out to be bigger than all those other costs combined. Oops! Gosh I wonder if we're underestimating anything else. Probably shoulda done something about this.

Appeared in: 2026-07-16 (#18) · 2026-07-17 (#18) · 2026-07-18 (#17) · 2026-07-20 (#10)

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