Donnie,

I am sorry to hear that you lost your fish. That is a big fear of mine right now. It seems like my fish have just disappeared. They hardly eat the commercial food and it is really difficult to even catch a perch on live bait. I have never even seen 1 dead fish, so I guess they are ok for now.
Have you added any chemicals to your pond to treat algae or for water clarity? Have you checked your
PH? I wonder with the high heat if your pond flipped and all of the toxic water on bottom came to the top. I am speculating, but a professional
will help you pretty quickly. Good Luck getting answers. Let us know what caused the fish kill, so maybe you can that from happening someone else.