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Emerging evidence also suggests wildfire smoke may have long-term health impacts and contribute to increased risk of chronic conditions. Those fires drove nearly a quarter of a million people from their homes. But the evacuees weren’t the only ones directly affected by Canada’s record-setting fire season.
Outdoor air pollution produced by vehicles, power plants, industry and agriculture is strongly linked to a wide variety of health problems, including respiratory conditions, cardiovascular impacts, negative birth outcomes, lung cancer and more; it causes at least PM2.5 is defined as any particle less than 2.5 microns in size and is a characteristic of all types of air pollution, including wildfire smoke.
The increased risk of hospitalization or death following wildfire smoke exposure is perceptible on a population level. A meta-analysis of existing studies, published in the, reported a 0.15% increase in overall deaths and a 0.25% increase in respiratory-related hospitalizations for every daily 1μg/m3 of wildfire PM2.5 exposure, as well as some evidence of increases in cardiovascular-related outcomes.
Globally, from 2010-2019, 2.18 billion people were exposed to at least 1 day of sizable air pollution a year from landscape fires , according to a. Studies on the health impacts of wildfire smoke are predominantly concentrated in higher income countries, but exposure to smoke is highest in lower income countries. Image by Xu, R., et. al via
“Our policy tools fail when it comes to air pollution … from wildfires, at least at this point. And yet has a real fingerprint on the air pollution exposures across our country and much of the world,” says Carlos Gould, associate professor at the University of California, San Diego, and one of theA wildfire on Kangaroo Island, South Australia, Jan. 2020. Australia’s infamous ‘Black Summer’ in 2019-20 was the worst fire season in Australia’s history, with over 24 million hectares burned.
There’s also emerging evidence that relatively short but intensive wildfire smoke exposures can contribute to increased risk of chronic conditions, which is both surprising and concerning, Brauer says.study found that while all types of PM2.5 air pollution increased risk of dementia, air pollution from wildfires and agriculture were associated with the highest risk.