WHO Advises Caution with Fans During Extreme Heatwaves

South Korea is grappling with an unprecedented heatwave, with temperatures soaring to a record high of 42.5 degrees Celsius in Yangsan. Amidst this extreme weather, the World Health Organization (WHO) has released crucial guidelines to combat heat-related illnesses and fatalities.

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It is advisable to spend 2 to 3 hours in a cool place each day.

The WHO's advisory emphasizes avoiding the outdoors during the hottest parts of the day and seeking shade, as direct sunlight can significantly increase perceived temperatures. A key recommendation is to limit the use of fans when temperatures exceed 40 degrees Celsius. The organization explains that in such extreme heat, fans can circulate hot air, potentially raising body temperature. Instead, it suggests blocking sunlight during the day and ventilating homes at night when temperatures drop.

For air conditioning, the WHO recommends setting the thermostat to 27 degrees Celsius and using a fan concurrently to lower the perceived temperature by up to 4 degrees Celsius, while also saving energy. Staying hydrated is paramount, with a recommendation to drink at least 2-3 liters of water daily, even without feeling thirsty. Cooling the body with cool showers or damp cloths is also advised.

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When the temperature exceeds 40 degrees, the fan's wind can actually move the heated air and raise body temperature.

Special attention is given to protecting infants and the elderly. The WHO warns against leaving children or pets in parked cars, even for short periods. For strollers, it advises against covering them with dry cloths, which can trap heat, and suggests using light, wet cloths or portable fans instead. Regular check-ins with the elderly and those with chronic health conditions are also stressed.

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Setting the air conditioner to 27 degrees and using a fan together can lower the perceived temperature by about 4 degrees and save up to 70% on cooling electricity costs.

Globally, heatwaves have claimed an estimated 489,000 lives annually between 2000 and 2019, with a significant portion in Asia and Europe. In South Korea, the extreme heat has already led to a fatality, with a young man in his 20s succumbing to heatstroke in Busan, highlighting the urgent need for public awareness and adherence to safety measures.

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It is recommended to drink one cup of water per hour, at least 2-3 liters per day, even if you don't feel thirsty.