So glad the PT worked for you, CurlyJulia.
I think water conservation is important no matter where you live, it's the overlooked scarce resource. If you put the PT on when you start a shower with some plastic over the hair and get it warm by sticking your head briefly under the water - you've got enough heat from your body to do the rest, even if the water is off. Enough heat for me, anyhow! I usually skip the plastic too.
http://science-yhairblog.blogspot.com/