Exposure to cold may lead to injuries such as Frostbite and
Immersion (Trench) Foot. The focus of survival medical training
should be general, but also take into account the type of
environment that you expect to live in if a disaster occurs.
  If you live in Miami, it’s unlikely you’ll be treating a lot
of people with hypothermia.  If you live in Siberia, it’s
unlikely you’ll be treating a lot of people with heat stroke.
Learn how to treat the likely medical issues for the area and
situation that you expect to find yourself in.  One major
environmental risk is the effect of ambient temperature. Humans
tolerate a very narrow range and are susceptible to damage as a
result of being too cold or too hot.  Your body has various
methods it uses to control its internal “core” temperature,
either raising it or lowering it to appropriate levels.  The
body “core“ refers to the major internal organ systems that are
necessary to maintain life, such as your brain, heart, liver,
and others.  The remainder (your skin, musc