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Heat exhaustion, which causes pale skin, muscle cramps and dizziness, may precede heat stroke but not always. Dr. Ruiz-Novero suggests moving to a cooler environment and rehydrating yourself or the person affected. If symptoms get worse, seek medical help right away. Wrap the individual in cool, wet towels or submerge him or her in a cold bath while waiting for help, says the American Red Cross.
In the end, remember to take it easy in extreme heat and drink lots water. Being aware of the body's internal thermostat can help protect you and your family from one of summer's more dangerous ills.