05/08/2026
โFewer cardiac arrests occur in summer.โ
โ FALSE
Warm weather may feel pleasant, but high temperatures can place significant stress on the body. During heat, the heart has to work harder to keep you cool. To release heat, blood vessels widen and the heart pumps faster. ๐
This increases oxygen demand and can create risks for people with underlying heart or vascular conditions.
Heat also causes fluid loss through sweating. As the body dehydrates, the blood becomes thicker, blood pressure rises, and the likelihood of clot formation increases.
Air quality plays a role too: on hot days, levels of fine particles and ozone are often higher, which can further strain the heart.
The combination of heat, dehydration and poor air quality means that the number of cardiac arrests can actually rise during summer!Thatโs why having an AED nearby is essential, especially when temperatures climb. ๐ฅ
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