Watermelon, or xi gua, is well known as a great remedy to cool down. One of my professors even recommended that women who had hot flashes should eat it daily. According to Southwest Acupuncture College, “To relieve heat exhaustion, the outermost layer of the rind is used as opposed to the sweet, juicy part of the fruit. In addition to clearing heat, watermelon promotes urination and reduces jaundice.”
But in some states, you definitely want to buy your melon whole.