Which statement regarding heat stress is true?

The assertion that lack of sweat is a symptom of heatstroke is accurate because heatstroke is a severe condition that occurs when the body's thermoregulatory system fails. In this situation, the body can no longer produce sweat, which is essential for cooling down. Unlike other heat-related illnesses, heatstroke can lead to a dangerously high body temperature, organ damage, and, if untreated, can be fatal.

In heat exhaustion, for example, individuals often continue to sweat, but heatstroke represents a critical failure of bodily functions where sweating ceases. Recognizing the lack of sweating as a key indicator of heatstroke is vital for timely intervention and treatment.

In contrast, the other options either misrepresent symptoms of heat stress or how protective equipment affects body temperature regulation. Understanding the specific symptoms of various heat-related illnesses helps in responding appropriately and ensuring safety in environments where heat stress is a risk.