Heatstroke is a medical emergency. Even with immediate treatment, it can be life-threatening or result in serious, long-term complications. You should call for medical assistance or for an ambulance when this occurs. These are the following first aid to be done: - Move the person into a cool place, out of direct sunlight. - Remove the person's unnecessary clothing, and place the person on his or her side to expose as much skin surface to the air as possible. - Cool the person's entire body by sponging or spraying cold water, and fan the person to help lower the person's body temperature. Watch for signs of rapidly progressing heatstroke, such as seizure, unconsciousness for longer than a few seconds, and moderate to severe difficulty breathing. - Apply ice packs in each armpit and on the back of the person's neck. - If a child has stopped breathing, begin rescue breathing. - Do not give aspirin or acetaminophen to reduce a high body temperature that can occur with heatstroke. These medicines may cause problems because of the body's response to heatstroke. - If the person is awake and alert enough to swallow, give the person fluids 1 liter to 2 liter over 1 to 2 hours for hydration. You may have to help. Make sure the person is sitting up enough so that he or she does not choke. Most people with heatstroke have an altered level of consciousness and cannot safely be given fluids to drink.

Drink lots of fluids. Heat stroke occurs to people who are excessively exposed to sun and lose water through sweat then their blood becomes thicker and chokes vessels. Drinking water is the only solution. Lots of water.