[DainBramage]

Okay so you would have them swim out into cold water with no flotation device to rescue a loon who will fight them to let him drown?

Start your honest debate there.

[bajabaja]

Fair enough.

http://www.nodc.noaa.gov/dsdt/cwtg/cpac.html

Shows June 1 to 15 for Alameda to have a water temp of 64 degrees. A wet suit works.

But,

Expected Survival Time in 60 to 70 degree water: 2 to 40 hours; exhaustion or unconscious in 1 to 2 hours.

http://www.ussartf.org/cold_water_survival.htm

Your turn.