Serious question from relocated east coast rider to the southwest.
How do I cross all that desert and not get completely cooked riding up from PHX? Late June is brutal.
Facing the same issue coming out of Texas in brutal heat, I wear a 3 liter camelback, fill it with ice and a bit of gatorade and mostly water, and fill it up at every gas stop with ice. The ice melts slowly, keeps the liquid nice and chilled and I stay hydrated.
Clothing...if it's killer hot, I don't wear a mesh jacket, or you just dehydrate even faster...I also stop about every 1/2 hour and pour a bottle of water on my head, shirt etc...keeps some evaporation / cooling effect.
Ride early early morning helps to get some miles down before the killer heat kicks in...