Wildfire pollution linked to higher stroke risk

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A study abstract presented at the American Academy of Neurology's annual meeting found that increased exposure to air pollutants like ozone and particulate matter during the 2023 Canadian wildfires was associated with a higher risk of stroke and more severe strokes in Camden, New Jersey. Researchers analyzed EPA data on air quality downwind from the fires and found that days with above average ozone levels saw an average of 1.25 strokes per day compared to 0.93 on below average days. The higher ozone days also saw more hemorrhagic strokes and more plaque buildup causing major arteries to harden.

Why it matters

This study is the latest in a growing body of research describing the significant health impacts of wildfire pollution. Earlier this year, another study found that pollution from wildfire smoke was linked to 24,100 U.S. deaths per year. As climate change drives an increase in the frequency and severity of wildfires, understanding the public health consequences will be crucial for mitigating the risks.

The details

Researchers analyzed EPA data on air quality in Camden, New Jersey, which is downwind from the 2023 Canadian wildfires. They found that ozone and particulate matter levels surged during the fires as compared to the same days the previous year. Days with above average ozone levels saw an average of 1.25 strokes per day compared to 0.93 on below average days. The higher ozone days also saw more hemorrhagic strokes and more plaque buildup causing major arteries to harden.

• The study abstract will be presented at the American Academy of Neurology's annual meeting next month in Chicago.