Wildfire air pollution linked to more than 24,000 annual deaths

By Rylan DiGiacomo-Rapp | 02/04/2026 04:22 PM EST

Risks come from inhaling the smoke, which can travel thousands of miles, a new study said.

People wear masks as they wait for the tramway to Roosevelt Island as smoke from Canadian wildfires casts a haze over New York City.

People wear masks as they wait for the tramway to Roosevelt Island as smoke from Canadian wildfires casts a haze over the area on June 7, 2023, in New York City. Eduardo Munoz Alvarez/Getty Images

A new study finds that wildfire smoke may be more dangerous than previously thought, adding to mounting evidence about the public health perils of wildfires.

Published Wednesday in Science Advances, the study said that wildfire smoke comes with a myriad of long-term health outcomes, causing roughly 24,100 deaths in the U.S. annually.

Inhaling the smoke can lead to respiratory illness, cardiovascular disease and neurological issues, even for those located thousands of miles from the scene, said researchers from the Icahn School of Medicine at Mount Sinai in collaboration with other universities.

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The trouble stems from PM2.5, particulate matter found in the smoke as it travels through the air. Researchers found no evidence of a safe exposure threshold.

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