Which condition can result from severe dehydration?

Severe dehydration can lead to heat-related illnesses due to the body's inability to regulate its temperature effectively. When the body is dehydrated, the volume of blood decreases, making it harder for the body to dissipate heat through sweating. This can potentially lead to heat exhaustion or heat stroke, particularly in hot environments or during physical activity.

In contrast, severe dehydration is more likely to decrease appetite, contribute to fatigue, and impair cognitive functions rather than improve them. Therefore, the connection between dehydration and the development of heat-related illnesses underscores the critical importance of maintaining proper hydration for overall health and performance, especially under conditions that put stress on the body.