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Wear loose, lightweight, and light-colored clothing to stay cool. Fan yourself with long, gentle motions. Try relaxation techniques to help lower your core temperature. Soak your feet in cold water to cool your body down. Take a tepid bath or sponge bath to lower your body temperature.
If possible, take off extra layers of clothing. Lightweight fabrics like silk, chiffon, thin cotton, and linen are the best choices for extreme heat. In addition, try to wear white and other light colors, which can help beat the heat by reflecting sunlight. If you can't get to an air conditioner or an electric fan, fanning yourself by hand can help lower your temperature. The key is to use a fan (or an improvised object) with a broad surface area and to avoid fanning yourself too vigorously. If your fanning motions are too fast, they'll get your blood pumping and make you hotter. Gentle motions can help the sweat on your skin evaporate, which helps lower your temperature. Dampening your skin with cool water while fanning yourself is also helpful. Try sitting comfortably and taking slow, deep breaths. As you inhale, count to 4, then hold your breath as you count to 7, and exhale for an 8 count. Do your controlled breathing exercises for at least 10 to 15 minutes to reduce your heart rate and lower your core temperature.  If it helps, put on some relaxing music or recordings of soothing nature sounds, like crashing waves or humpback whale songs. You could also give meditation a try. You can find guided meditations for relaxation on YouTube and other services. Relaxation techniques can help you cool off if you’re experiencing hot flashes. Fill a small basin with cold water and ice, then place your feet inside. Soak them for 15 minutes at a time to prevent ice burns. Add ice or refill the basin with cold water when it starts to get warm. If you want to reduce a fever, a lukewarm bath is better than a cold bath. Submerging yourself in cold water can cause shivering, which can increase your body temperature.  If you don’t have access to a tub, try using a damp sponge, washcloth, or sheet.  Having a fan blowing on you while you bathe or sponge yourself can also be effective.