Very sad.
The newspaper article refers to death by "hypothermia," but that seems to be a misnomer.
The correct terms: "cold shock" and "swimming failure."
Google educated me a bit on this unfortunate issue: see link:
http://www.seakayakermag.com/2008/Feb08/cold-shock.htm
I wondered why a good swimmer couldn't swim 100 feet or so to safety: now I know.
Still, very tragic.