Which statement about heat stress is true?

Heat stress encompasses a range of conditions that arise due to excessive heat, with heatstroke being one of the most severe forms. In cases of heatstroke, the body’s temperature regulation fails, and one of the critical symptoms is indeed the lack of sweating, despite the high body temperature. This occurs because the body's mechanisms to cool itself are overwhelmed, leading to a potentially life-threatening situation.

By understanding that heatstroke is characterized by a high body temperature and diminished sweating, it illustrates the severity of this condition compared to others, such as heat exhaustion. In heat exhaustion, individuals typically still have the ability to sweat, albeit at levels that may indicate they are on the verge of heat-related illness.

Moreover, nausea is actually a common symptom of various heat-related illnesses, including heat exhaustion, which makes the assertion about nausea incorrect. Additionally, drinking water is vital in managing heat stress as it helps to rehydrate the body and restore lost fluids. This underscores the importance of staying hydrated, particularly in hot conditions, to prevent heat-related ailments.