It's your first session of two-a-day practices, under a hot summer sun. Though many of your players worked out over the summer, few of them have been working out in heat like this. One of your tailbacks, Randy, is really slowing down. You call him over for a closer look and see that he has beet red cheeks. He says he's really thirsty and his mouth is dry, but he wants to get back into the practice.
Randy takes a quick water break, and you let him return to practice. At the next break, however, you check on him and he says he feels sick, he's having chills, and he's feeling very tired and thirsty.
You realize Randy has a heat-related illness. You conduct a primary survey and find his pulse is weak and rapid. His face isn't beet red anymore, but pale, and his skin feels quite cool.