Which of the following conditions is also a life-threatening emergency that needs immediate attention?

Heat stress is indeed a life-threatening emergency that requires immediate attention. This condition occurs when the body is unable to regulate its temperature effectively, leading to a rise in body temperature that can result in heat exhaustion or heat stroke. Both of these conditions can be severe and have serious health implications if not treated promptly.

In the case of heat stress, early signs include heavy sweating, weakness, and dizziness, which can quickly escalate to more serious symptoms such as confusion, loss of consciousness, and organ failure if the body continues to overheat. Immediate intervention, such as moving the person to a cooler environment, providing hydration, and monitoring vital signs, is crucial to prevent progression to life-threatening states.

While nausea, sunburn, and cramps can be uncomfortable and may warrant medical attention, they do not typically represent immediate life-threatening situations in the same way that heat stress does. For example, nausea can stem from a variety of less severe conditions and may resolve on its own, sunburn may lead to skin damage but is not immediately life-threatening, and cramps usually indicate dehydration or overexertion, which, while potentially serious, do not carry the same urgent risks as severe heat stress.