Worth remembering! I had my sweet gal (at 3) go in over her head as we sat on the steps. She went under right in front of me! within arms reach and I didn't realize at first she was in trouble! The bad thing is that a few minutes later she did it again. And again I was slow to react.
As a former lifeguard, I can't tell you how easy it is to miss someone. Back when I took class they didn't even talk about this.
It's a good idea to teach your kids this info too. If you enforce the buddy system (stick together in pairs, even at the pool and especially at a lake or at the ocean) they will watch out for each other. Even kids who know how to swim can drown.
I'm a person. With lots of ideas :) Curious about how the unseen affects the seen. How we express ourselves, about how we don't. How we resist, how we fight, how we chill. My fav question is "why?", next is "how?" when doesn't matter :D