Boiling point of water in Death Valley?

Answer 1

Like water anywhere (pending altitude, which isn't a factor here) it boils at 100oC/182oF/373oK.

Except altitude is a factor, since the boiling point of water varies by altitude and the barometric outside air pressure (which essentially adjusts the pressure altitude up or down). Although Death Valley is only 282 feet below sea level, that's enough to push up the boiling point by almost half a degree Fahrenheit, assuming the same barometric pressure.

Both are important, because people often memorise their "local" boiling point, so that they can make allowances in cooking, without realising that the "corrected" boiling point can also vary, depending on local weather. Similarly, many sources of local barometric pressures are given "adjusted to sea level," so both have to be taken into account.

Test it for yourself:

http://www.csgnetwork.com/h2oboilcalc.html

Answer 2

About 212.5 F