If you're looking to beat the heat this summer you should consider getting hot coffee each morning. That's right, Anthony Bain a PhD candidate explains that the body primarily cools itself down through sweating, and the brain receives the signals to begin cooling down from thermosensors located in the body. So when you  take a sip of something hot, the thermosensors in the stomach become overactive and send strong signals to the brain that you are too hot. In turn, the brain over-compensates the sweating response. Bain says, "When this sweat evaporates from our skin, the heat energy we lose due to evaporation exceeds the heat energy gained by drinking the hot drink." But there's a catch, in order for your sweat to cool you down it must be able to evaporate. So the hot drink trick only works if you're not too hot and sweaty in the first place.