I think I run into that problem on occasion in my 1/10th acre
sediment pond . Sometimes after a big rain event I will find a few dead fish in the even tinier pond ahead and connected to it.
This pond catches about half the watershed for my main 3 acre pond. So during a large rain event it could have several full water exchanges in a matter of hours. If a rain comes hard and cold with rapid inflow, I know it must stress the fish at best.
