Which of the following indicates heat exhaustion?

Heat exhaustion is a condition that occurs due to excessive exposure to heat, often accompanied by dehydration. It is characterized by specific symptoms that differentiate it from heat stroke or other heat-related illnesses.

When someone experiences heat exhaustion, the body typically responds by sweating profusely to cool itself down. This can lead to pallor and a decrease in body temperature in some cases, as the body's attempts to manage heat stress begin to reveal symptoms. Normal body temperature may still be maintained initially, but if dehydration continues, it can elevate to a more severe state.

The presence of pale skin and profuse sweating highlights that the body is trying to cool down, which aligns with the symptoms of heat exhaustion. Recognizing these signs early is critical for effective treatment and to prevent progression to more serious conditions like heat stroke.

In contrast, the other choices describe symptoms associated with different conditions or more severe cases of heat-related illnesses, rather than the classic presentation of heat exhaustion.