Summer heat is a type of strong, active energy that comes from the outside world. When summer heat hits your body, you might get headaches, fevers, and feel really thirsty. You could also feel down, sweat a lot, and have a fast, strong heartbeat. Summer heat can also mess with your body's fluids, making you feel tired, weak, and giving you a dry mouth. In some places where it's super damp or humid for a long time, summer heat can team up with this dampness. This combo can make you feel like your chest is heavy, and you might feel like throwing up or have problems like diarrhea.