People over 80 years old
Due to impaired thermoregulation
Children
Due to their proportionately larger body surface area
Some medical conditions
Hypothyroidism, stroke – due to impaired thermoregulation
Intoxication
Alcohol, recreational drugs
Drowning
In association with drowning and in people exposed to cold, wet and windy environments especially if inadequately dressed
Exhaustion
Unable to move around to keep warm
