Hypothermia - State of Alaska - The patient with severe hypothermia must be handled very gently, a cold heart is very prone to cardiac arrest. Even cautious movement of the patient may induce cardiac arrest.
BBC News: Hypothermia: The facts - Exposure to the cold is estimated to cause 30,000 deaths a year in the UK. Hypothermia is one of the most deadly cold-induced conditions.
Hypothermia - Links to useful sites on cold-weather injuries.