I thought this an interesting statistic, as quoted from an article on the death from the Sierra Wave News (Bishop):
The hiker is thought to have set off on Sunday or Monday in 118 degrees Fahrenheit heat with
up to 91 percent humidity due to scattered showers. To give readers some idea of how “hot”
that combination of extreme hot temperature and very high humidity “feels,” according to the National Weather Service Heat Index Calculator, it is the equivalent to the body feeling the
temperature of 320˚F (160.4˚C).