42-45C is the temperature of the very hot onsens in Japan (at least according to the thermometer reading at an onsen I visited there)... So no I don't think it'd cause injuries...
just to put in perspective for the non-metric aware in here:
human body temperature ~37C
water freezes at 0C and boils at 100C
45 degrees Celsius = 113 degrees Fahrenheit
It won't cause injury but it's not exactly easy to jump into.