http://www.niapublications.org/agepages/hypother.asp
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National Institute on Aging Information Center
Cold weather is very risky for older people. Almost everyone knows about winter dangers such as broken bones from falls on ice or breathing problems caused by cold air. But the winter chill can also lower the temperature inside your body. That can be deadly if not treated quickly. This drop in body temperature, often caused by staying in a cool place for too long is called hypothermia (hi-po-ther-mee-uh).