Lightning strikes can involve currents as high as $25000$ AA that last for about $40$ ss$.$ If a person is struck by a bolt of lightning with these properties, the current will pass through his body. We shall assume that his mass is $78$ kgkg$,$ that he is wet $($after all, he is in a rainstorm$)$ and therefore has a resistance of $1\mathrm{.}5,$ and that his body is all water $($which is reasonable for a rough, but plausible, approximation$).$ By how many degrees Celsius would this lightning bolt increase the temperature of $78$ kgkg of water?

Express your answer in degrees Celsius.