Not true.
I find it hard to believe 136 degree water would even blister,
Believe it. 136 can take the skin right off.
It's picking nits to go into the details of the level, the main point here is that it's difficult to believe that someone could suffer that level of damage at that temperature over a large area, at least conciously. Right off the bat it tells me that 750 large as a payout for it is BS.
I do note that kids seem to be exceptionally vulnerable to relatively low temperature water burns, maybe it's the full immersion VS heat management ability of little bodies, because it seems adults deal with stuff around this range fairly frequently.
A friend of my Mothers slopped a cup of just-shy-of-boiling coffee on my chest when I was about ten, it didn't blister, the skin just fell off. Thankfully, the follicles remained intact, I never needed a chest wig...