Final answer:
The recommended water temperature for treating someone with exertional heat stroke is about 10°C to 12°C (50°F to 59°F), as it allows for rapid cooling without the risks associated with ice-cold water immersion.
Step-by-step explanation:
The appropriate temperature of the water for immersing someone with exertional heat stroke should take into account that the body is already experiencing elevated temperatures and that the goal is to bring the person's core temperature down to a safe level quickly. Immersion in cool water is recommended by many health professionals. A commonly suggested temperature for the water is approximately 10°C to 12°C (50°F to 59°F), as it is effective for rapid cooling. It is crucial not to use ice-cold water as it may lead to other complications such as shivering which can increase internal body temperature, or vasoconstriction which can slow down heat transfer from the core to the surface of the body.