What is a common symptom of heat exhaustion?

A common symptom of heat exhaustion is an increased heart rate. This occurs as the body attempts to cool itself down during overheating conditions. When a person is exposed to high temperatures, particularly while engaging in strenuous activity, the body loses fluids through sweating, which can lead to dehydration. To compensate, the heart works harder to circulate blood and maintain adequate circulation to vital organs, resulting in an elevated heart rate.

In contrast, symptoms such as a fever over 101°F, confusion, and loss of consciousness are more indicative of heat stroke, which is a more severe heat-related illness. They signify a critical condition that requires immediate medical attention. Recognizing the early signs of heat exhaustion, such as increased heart rate, is vital for prompt intervention to prevent progression to heat stroke.