It is late in the afternoon, and your team is finishing its third match of the volleyball tournament on the beach. The day has been hot, with temperatures in the 90s. Suddenly, a teammate collapses. They are responsive, but do not appear to be fully awake, only opening their eyes when you talk to them. They are breathing rapidly. You notice the skin is very warm, sunburned and moist. They are unable to get up from the ground. You want to help. How do you proceed?