Final answer:
Hyperthermia is best known as heat stroke, a condition of elevated body temperature leading to potential severe health risks, unlike hypothermia, which involves dangerously low body temperatures.
Step-by-step explanation:
Hyperthermia is also known as heat stroke. It refers to an elevated body temperature condition where the body absorbs more heat than it dissipates. Unlike hypothermia, which is a dangerous decrease in core body temperature, hyperthermia can lead to adverse effects such as increased heart rate (HR), strength of contractions, and if severe, metabolic dysfunctions that can result in death. Frostbite is a condition that results from reduced blood circulation in cold temperatures, typically affecting extremities like fingers and toes. Sunburn, on the other hand, is skin damage caused by excessive exposure to ultraviolet radiation from the sun. Hence, hyperthermia is primarily associated with the excessive heat condition known as heat stroke.