Mike your advice and everybody else's, back in 2007, was excellent and I remember reading it and using several of the tips to stay cool riding here in Texas. However fast forward to July 25th 2009 and we leave Weatherford for Palm springs, CA on the RSV on I-20/I-10. I prehydrated for about three days before we left, used a camel back extensively, poured lots of water on ourselves as the temps were in the lower 100's across Texas and NM. We got to Phoenix and it was 115 deg and the same out to CA, so we kept sipping water constantly all the way to Palm Springs. Had a great visit, about two weeks and then headed home. I checked the weather and saw the temps on the northern route (I40) were in the mid to low 90's so we came home that way. Due to having fun, etc. I didn't prehydrate and the cooler temps lulled me into not drinking as much water as I needed. To make a long story a little shorter, I made it to Albuqurque before I collapsed.. Made it to a motel and had to call a friend to bring his trailer and bring us home. When I went to the ER a couple days later they gave me two IV bags of fluids before I felt better.. So I learned a very important lesson or two. 1. If its a planned trip, prehydrate and keep hydrated at all times in the warm/hot weather. If you start feeling thirsty while riding stop and get some fluids in you. 2. Review your skills and limitations now and then to refresh yourself..