Which statement about heat stress is true?

The statement regarding the lack of sweat being a symptom of heat stroke is accurate and reflects an important understanding of heat-related illnesses. In heat stroke, the body can no longer regulate its temperature effectively, and one of the critical signs is the absence of sweating, despite elevated body temperatures. This occurs because the body's thermoregulatory mechanisms fail, leading to a dangerous rise in core temperature.

Understanding this can highlight the severity of heat stroke and the need for immediate medical attention, as it can result in serious complications or even death. Recognizing symptoms like the absence of sweat, alongside other indicators such as confusion, rapid pulse, and unconsciousness, is crucial for any individual working in conditions where heat stress might be a risk.