Meteorologist Jaden Knowles said swimming in a pool cools the body and reduces the effects of extreme heat [1].
Understanding these mechanisms is critical for public safety during heatwaves, as effective cooling prevents heat-related illnesses and reduces physiological stress on the heart and lungs.
Speaking from Water World, an aquatic center, Knowles said the science behind thermal regulation [1]. The process relies on the ability of water to absorb and conduct heat away from the skin more efficiently than air [1]. When a person enters a pool, the temperature difference between the body and the water allows for a rapid transfer of heat [2].
This cooling effect is essential during extreme temperatures when the body's natural cooling mechanism — sweating — may not be sufficient to maintain a safe internal temperature [1]. By immersing the body in water, the heat is drawn out of the core and released into the surrounding liquid [2].
Knowles said that this method of cooling provides a more immediate reduction in body temperature than staying in shaded air [1]. The interaction between the skin and the water helps to lower the overall heat load on the body, which can prevent the onset of heat exhaustion [2].
Public health officials often recommend utilizing cooling centers or swimming facilities during peak heat alerts to mitigate these risks [1]. The ability to rapidly lower core temperatures is a primary defense against the dangers of prolonged exposure to extreme heat [2].
“Swimming in a pool cools the body and reduces the effects of extreme heat.”
The reliance on aquatic cooling highlights the importance of accessible public infrastructure, such as pools and cooling centers, during climate-driven heat events. As extreme temperature spikes become more frequent, the physiological ability to rapidly shed core heat through conduction becomes a vital tool in preventing widespread heat-stroke emergencies.
