In-depth look at how cold water can disable or kill you

In-depth look at how cold water can disable or kill you »Play Video
RENTON, Wash. -- When warm weather lures people outdoors, cold rivers are one of the most dangerous hazards.

Even for strong swimmers, experts say the cold water cold water can disable you within a minute.

Boating safety instructor Dan Henderson explained how the initial plunge into river water can easily -- and quickly -- claim a life.