The number of people trying to 'clock' me with incorrect science You guys need to learn the difference between evaporation and boiling.
Vaporisation in a boiling hot spring is classed as boiling, not evaporation as some of you keep claiming
Boiling can also mean using boiling water to cook something, which is probably what the OP meant. But I turned out to be right anyway, since the body is 70% water, and this water will vaporise, so at most 30% of him will remain unvaporised...