By TERRY TOMALIN, Scripps Howard News Service

HYPOTHERMIA
Hypothermia occurs when more heat escapes from your body than your body can produce. Signs and symptoms of hypothermia may include gradual loss of mental and physical abilities. Severe hypothermia can lead to death.
WHAT TO LOOK FOR:

When sea kayaker Derek Crook set out to circumnavigate Tasmania earlier this year, the Canadian adventurer knew the dangers involved. Midway through his 36-day expedition, a wave flipped his kayak and left him fighting for his life on an offshore reef.