Increase salt and water intake. Stay out of sunny, hot places. Drink plenty of fluids.
First aid Have the victim lie down in a cool place.
Give the victim half a cup every 15 minutes. To alleviate muscle cramps, massage the cramps gently but firmly until the muscles relax If the victim has bluish lips and fingernails and decreased alertness, administer first aid for shock. If the victim begins to have seizures, administer convulsion first aid. If the victim is suffering from serious heat stroke, get medical help. DO NOT Underestimate the seriousness of heat illnesses.