What is a common symptom of heat exhaustion?

A common symptom of heat exhaustion includes heavy sweating, weakness, and dizziness. During heat exhaustion, the body loses a significant amount of fluid and electrolytes due to prolonged exposure to high temperatures, especially when physical exertion is involved. This results in a decrease in blood volume and consequently affects blood flow to vital organs and muscles, leading to symptoms such as weakness and dizziness. Evidence of heavy sweating indicates the body's attempt to cool down, but as dehydration progresses, this may lead to confusion, fatigue, and fainting if not addressed promptly.

While nausea and vomiting are also symptoms commonly associated with heat-related illnesses, they are considered more typical of the later stages of heat exhaustion or heat stroke, rather than the earlier symptoms. Fever and chills are more characteristic of infections or other illnesses rather than heat exhaustion. Similarly, shortness of breath and chest pain could indicate a cardiac event or respiratory issue, which does not align with the typical symptoms of heat exhaustion. Thus, the combination of heavy sweating, weakness, and dizziness serves as the hallmark signs that an individual is experiencing heat exhaustion.