How to treat hyperthermia or heat stroke?

A medical emergency: Hyperthermia can first be treated with hydration and cool compresses and getting the person out of the heat. Heat stroke is when the body can no longer release the heat by perspiring, so the skin will be red and dry. This is a true medical emergency and needs to get help in a hospital. Always check on the elderly during very hot weather.

Water and cooling: Best treatment is prevention. Pre-hydrate before heat exposure and continuing to hydrate, wear loose clothing and take breaks. Once heat stroke occurs, IV fluids, which may themselves be cooled are used in addition to external cooling.

Heat Stroke!: Heat stroke is the most serious form of heat injury and is considered a medical emergency. If you suspect that someone has heat stroke -- also known as sunstroke -- call an ambulance immediately and give first aid until paramedics arrive. http://www.webmd.com/a-to-z-guides/heat-stroke-symptoms-and-treatment#1