Which of the following are characteristics that differentiate between heat exhaustion and heat stroke? Select all that apply.

Choice A rationale This statement is incorrect because hot, dry skin is a hallmark characteristic of heat stroke rather than heat exhaustion. In heat stroke, the body's thermoregulatory mechanisms fail entirely, and the person stops sweating, leading to a dangerous rise in core body temperature, often exceeding 104 degrees Fahrenheit or 40 degrees Celsius. In contrast, patients experiencing heat exhaustion are typically still able to sweat profusely as their body attempts to dissipate heat through the process of evaporation. Choice B rationale Heat exhaustion often involves hypotension and tachycardia as the body attempts to compensate for significant fluid and electrolyte loss. Excessive sweating leads to a decrease in intravascular volume, which lowers blood pressure. The heart rate increases as a compensatory mechanism to maintain cardiac output and perfusion to vital organs. These clinical findings are essential for differentiating exhaustion from simpler heat cramps. Understanding these hemodynamics helps the nurse prioritize fluid resuscitation to prevent the progression to life-threatening heat stroke. Choice C rationale Altered mental status, confusion, seizures, or coma are definitive characteristics of heat stroke that distinguish it from heat exhaustion. As the core body temperature rises to critical levels, the central nervous system becomes impaired due to thermal injury and cerebral edema. While a person with heat exhaustion may feel weak or dizzy, they generally remain cognitively intact. The presence of neurological dysfunction signifies a medical emergency requiring immediate and aggressive cooling measures to prevent permanent brain damage or multi-organ failure. Choice D rationale Excessive sweating and clammy, pale skin are classic signs of heat exhaustion. During this stage, the thermoregulatory system is still functioning but is overwhelmed by the heat load and fluid depletion. The skin feels cool and moist because the body is still pushing blood to the periphery to encourage cooling through sweat. Normal lab parameters for sodium are 135 to 145 mEq/L, and these levels can fluctuate significantly during heat-related illnesses, requiring careful monitoring and replacement during treatment. .