Which of the following is a symptom of heat-related injuries?

Heat cramps are indeed a symptom of heat-related injuries. These cramps occur when the body loses significant amounts of salt and fluid through sweating, especially during vigorous physical activity in high temperatures. The body attempts to cool itself through sweating, but excessive heat exposure can lead to muscle cramps as the muscles respond to the electrolyte imbalance.

Understanding heat cramps as a symptom emphasizes the body's physiological response to overheating and dehydration, making it critical to address immediately. Resting in a cool place, rehydrating with fluids that contain electrolytes, and stretching the affected muscles are essential steps to alleviate heat cramps.

Other symptoms of heat-related injuries might include cold sweats, nausea, and severe headaches, but heat cramps are specifically indicative of the body's struggle with heat stress and fluid loss.