Isn't the moisture content going to put a blanket on the most extreme temperatures though? The wetter the air is the harder it is to heat up.
As an example (besides the usual onshore flow stuff), Death Valley (as an example) has not exceeded its all time record of 134 set in 1913. Even if that record is eventually proven to be too high, their all time record has *stalled* in the 129-130 degree range. Same goes for the other global hot spot on the planet, the Middle and Near East (which have all time record highs in the 129-130 region also.) Do you think that the planet has a cap for how hot it can actually get? And would this be because of the amount of water that we have on the planet that will be a barrier to the highest temperatures on the planet from getting much hotter? So, for example, if we eventually see 3C of warming, would the hottest temperatures on the planet be limited to a 1C rise on the high end?