[Mogger]

4 degrees above average means in the past, to get an "average" number, there were numbers above and below the "average".

It looks like this is one of the higher numbers.

[al_c]

Yep

[Bob434]

[[4 degrees above average]]

My goodness, how will the fish ever survive a short term immersion in such a piddly temperature rise? Why they’ll boil to death in a matter of seconds, just like all mankind spontaneously combust into flames every time it goes from say 50 degrees to 54 degrees