Tulsa flood.
Was at my grandparents when that Memorial Day weekend storm hit. IIRC, it was 14 inches of rain in one day. My grandad had moved their in 1927 and he thought all the construction in the low spots was pretty stupid.
There was another Tulsa flood nine years later, same day, Memorial day! My brother got caught in it! We were living on HIGH GROUND then.
I remember the first Tulsa flood, 1957 I think before Keystone Dam was built.
There, you could spit or p**s in Joe and Mingo creek and you would have a flood on your hands!