Reduce the intensity of exercise until your body is used to the heat.
Arrive at each practice hydrated, and drink when you can.
Educate coaches and athletes about heat-related illness and proper hydration.
Reduce the amount of equipment and clothing worn by the athlete.
Back off on your intensity if you can.
Have practice in the coolest part of the day.
Speak up if you do not feel well. If you feel that your body is trying to tell you something, let someone know immediately. If a player or another athlete is struggling more than usual, don't be afraid to say something to ask them.
For more information on heat-acclimatization guidelines for student athletes, refer to NATA (National Athletic Trainers' Association) consensus statement.