I must have missed this memo in the "beginner's horsemanship" class. I've always just hosed my horses off and let them dry out on their own; no toweling, no scraping.
I just participated in several classes at a horse show yesterday, and we were probably out in the 30 degree celcius heat for a good 6 hours. As soon as I got my mare home I took a hose to her, which she really appreciated. Normally she is antsy around water but this time stood absolutely still and just closed her eyes. Poor girl was very hot and tired. She seemed to think it helped her cool down though!
She is still alive, and dry, today. I guess I'm a bad owner.