You and your friends are going on a long hike in sunny Moab, Utah, in late May. The hike is the first in a series of endurance training sessions you will do to prepare for the Pikes Peak Ascent (a half marathon to the top of Pikes Peak, 14,000 ft) in Colorado Springs in mid-August. The average daytime temperature in Moab in May is 85°, and the relative humidity averages 20%. You plan to be gone on the hike for 3 hours. You have a pack that is large enough to carry sufficient fluids for your personal needs for the duration of the hike. How will the environmental conditions in Moab affect your fluid needs?