When the weather gets above 100 degrees Fahrenheit, the only way for the body to cool itself and stay at 98.6 degrees is to sweat, write UTMB Drs. Sally Robinson and Keith Bly in their Keeping Kids Healthy column. “Sweating is effective in keeping the body at its normal temperature, but the body has to have plenty of water to produce sweat. When your body runs out of water, you can overheat quickly. … Even if your child doesn’t say he or she is thirsty, they still should drink because usually by the time you’re thirsty — you’re already dehydrated. Caffeinated drinks should be avoided because they can cause dehydration.”