Heat exhaustion, which could lead to heatstroke, was a condition in which an individual was taking in more heat than he or she could handle. A Human who suffered from heat exhaustion would experience dehydration, various delusions including hallucinations, and fatigue. In 2152, Commander Tucker suffered from heat exhaustion while stranded with Captain Archer on the desert surface of the Torothan homeworld. (ENT: "Desert Crossing")