Extreme Temperatures Tied to Global Increase in Stroke Deaths, Disability

In the first study to assess the global stroke burden attributed to nonoptimal temperatures, investigators found that in 2019, more than 500,000 people around the world died of stroke linked to extreme temperatures — both hot and cold. The study also revealed there were 9.4 million disability-adjusted life years attributed to stroke because of nonoptimal temperatures.

Investigators also obtained land temperatures for 204 countries and territories from 1990 to 2019 from the Climate Research Unit Guided Time Series. For each location, the investigators calculated mean temperatures and compared them with hottest and coldest days for the regions. Of the 521,031 stroke deaths in 2019 attributed to extreme temperatures, investigators found that 474,002 were linked to low temperatures. Fewer deaths and DALYs were associated with extreme heat. However, stroke attributable to high temperatures also increased over three decades.

In the case of heat extremes, sweating may cause the blood to hypercoagulate, which promotes thrombosis, possibly leading to stroke.

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Study says half-million stroke deaths linked to extreme temperaturesExtreme temperature fluctuations linked to climate change could be a factor in roughly a half-million deaths and additional cases of disability from stroke around the world, according to a new study published in Neurology, the journal of the American Academy of Neurology.
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