What defines hypothermia?

Hypothermia is characterized by a significant drop in the body’s core temperature, specifically below 95°F (35°C). This definition is critical in understanding the physiological effects of cold exposure on the human body. At this temperature, the body's normal functions begin to become impaired, which can lead to severe health risks.

In contrast, the other choices do not accurately represent the condition. For example, a drop below 98.6°F (37°C) is a normal variation and does not indicate hypothermia. Likewise, a body temperature that remains normal, or exceeds 100°F (38°C), pertains to conditions such as hyperthermia or fever, but not hypothermia. Thus, the identification of a core temperature of less than 95°F (35°C) is essential for recognizing hypothermia and initiating appropriate treatment.