In 1994 I was living in Sydney. 52c was recorded which is the highest ever recorded temp in Australia...Only the recording station was not an "official" recording station.
When I was a kid, I remember the warnings...If it got to 105f (40.5c) we had to leave school and go home. I remember being sent home twice !
I am pretty sure that 44 is enough to kill fish...and cook them
itsaboat mate...Life is just a boat and then ya marry one !