Children also have a relatively larger body surface area which contributes to more rapid heat loss.
Hypothermia is present when the core body temperature drops below 95F. Early symptoms of hypothermia include shivering, euphoria and possibly the appearance of intoxication. Some specific diseases or conditions including seizure disorders and sickle cell anemia are associated with impaired thermoregulation. Some medications may also affect the body's ability to tolerate cold weather. Conditions in the danger zone make it dangerous for doing exercise outdoors. Immersion in water or wet clothing create even more dangerous conditions due to increased conductive loss of heat.