Which of the following is a common symptom of heat stress?

Headache and heavy sweating are common symptoms of heat stress due to the body's attempt to cool down when exposed to high temperatures. When the body overheats, it produces sweat as a cooling mechanism. A headache often accompanies this condition as the body becomes dehydrated, leading to decreased blood flow to the brain. This is caused by the loss of fluids and electrolytes through excessive sweating, which can also result in fatigue and feelings of dizziness.

In contrast, while dark urine and a rapid pulse can indicate dehydration or other health issues, they do not specifically encompass the classic symptoms of heat stress. Rash formation, additionally, is not a direct symptom of heat stress but could arise from other conditions or irritants. Understanding these specific symptoms is crucial for recognizing and addressing heat stress in individuals who may be exposed to high-temperature environments.