By Terry Mason, MPH Dehydration is the condition that results when too much body fluid is lost. The body is about two-thirds water. When the total water level drops by only a few percent, the person becomes dehydrated. Dehydration results when fluid loss is greater than fluid intake. Dehydration may be mild, moderate, or severe.
Severe dehydration can lead to shock and death.
Dehydration is sometimes severe. Serious cases usually occur in infants, sick people, athletes, and the elderly. Unless severe dehydration is treated very quickly, death can result. Early intervention is the best prevention. The body needs a constant source of fluids.