This is an excellent article. Thank you for posting it, Calmloki. I was a lifeguard during several college summers. I never lost anyone, but I had a few close calls.
I was swimming with the woman who later became my wife at Venice Beach when she first came out to California from Italy where she was used to the Mediterranean. She got into trouble just beyond the surf line and I swam out to her and started towing her in through moderately heavy surf. The lifeguard saw us and swam out with a buoy and took over, for which I was grateful. I had been a lake lifeguard, and though I was used to ocean swimming I was not used to ocean lifeguarding. Things can go bad fast in the cold water and heavy surf.
Ha