Heat stroke victim can be provided relief by immersion in temperate water rather than using ice. A research by Professor Nigel Taylor of Wollongong University reveals that "Cooling in temperate water took only marginally longer than that in cold water, and one cannot imagine that the 45 secs cooling difference would have any meaningful physiological or clinical implications."

According to the researchers sudden cold-water immersion may actually block the blood supply to the skin and make it harder for heat to disperse from the body.

"Cooling in temperate water took only marginally longer than that in cold water, and one cannot imagine that the 45 [second] cooling difference would have any meaningful physiological or clinical implications," Associate Professor Taylor and colleagues wrote.

According to a Sports scientist Matt Brearley once a person's core temperature reaches 39.5C to 40.5C he can get high fever. At this temperature, “most of the bodily processes will start to break down" and people lose their ability to regulate blood flow properly and can even stop sweating which means they store more heat at the time when they most need to dissipate it,” Brearley said.