As heatwaves intensify across India, many people are turning to simple, readily available ways to cope with the scorching sun. One common practice is to wrap a wet dupatta, scarf, cotton gamchha, or cloth around the head before stepping outdoors. It is widely used by street vendors, commuters and outdoor workers for quick relief. But can it truly protect the body from dangerous heat conditions?
How a wet cloth cools the body
Doctors say the idea has some scientific basis, but only to a certain extent. According to NDTV, Dr Preethi Pereira, Consultant, Paediatrician & Neonatologist, Manipal Hospital, Goa, explained, "A wet cloth cools the skin through evaporation. As the water evaporates, it draws heat away from your body, which can lower surface temperature and give a temporary sense of relief. It's similar to how sweating works."
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This cooling process is known as evaporative cooling. However, its effect depends greatly on weather conditions. In places with high humidity, evaporation slows down, reducing the cooling benefit. The doctor added, "It's not a complete safeguard against heat-related illness. In very high humidity, evaporation slows down, so the cooling effect drops."
Can it prevent heatstroke?
The short answer is no. While a wet dupatta may feel soothing for some time, it cannot stop heatstroke. Heatstroke is a serious condition where body temperature rises above 40 degrees Celsius, and the body can no longer cool itself properly. It requires immediate medical attention.
As per NDTV, Dr Pereira warned, "In extreme heat, the bigger risk is actually a false sense of security, delaying proper hydration or rest." Depending only on a wet cloth while ignoring water intake, shade and breaks can raise health risks. Can wet fabric cause a cold or flu?
The doctor clarified that a damp cloth does not cause infections. "This practice doesn't cause infections like cold or flu, since those are viral," Dr Pereira said to NDTV. However, wearing wet fabric for long periods may lead to discomfort, headaches or sinus irritation in some people. If the cloth is unclean, it may also trigger skin or scalp problems. Who should be careful?
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The method is generally safe for healthy people outdoors, but some groups need extra caution. These include elderly people, young children, those with chronic illnesses, weak immunity, migraines or sinus issues. Very cold water or prolonged use may cause discomfort. What works best during a heatwave
Experts say a wet cloth should only be a small part of staying safe in summer. The most effective steps remain drinking enough water, resting in shade, reducing sun exposure and keeping the body cool through proper measures.
