If you develop any of these symptoms, you must take steps to lower your body temperature and get hydrated. Stop exercising immediately and get out of the heat. Cool your body down by removing extra clothing or equipment. Sit in a tub of cold water or place wet towels or ice pack on your neck, forehead and under your arms. Continue to drink fluids. If your condition gets worse or you don't start to feel better, seek medical attention or speak with your healthcare provider.