I do a lot of desert hiking myself in 90+ degree weather. For a ten-mile canyon hike in Joshua Tree I’d usually carry one and a half gallons in a mix of quart and half gallon bottles. One-quart bottle I usually have filled with an electrolyte replacement mix and carry an extra package to mix a second bottle if I start to feel cramps in my legs or stomach. Every half hour I measure out a cup or two of water and drink it down. By measuring out my water I know exactly who much I have and always head back when I have drunk half of my supply. Other things I do in the desert are to wear breathable nylon leather boots and good quality wool socks with nylon liners. Every hour or two I’ll change into a pair of dry socket and give my feet a quick rub down with a little alcohol I carry in a small spray bottle. All topped off with a ball cap and bandana to keep the sun off my head and neck. With this, I’m ready for a day of solitude, the desert is one of the few place I’ve been where you can hear your own breath and heart beat.