I don't blame you @Sighlass but a few years ago I got 56" over a four-day period. Not even remotely Biblical.
I think it also depends on location (mountains)... Most folks got between 10 - 15 inches of rain in North Carolina during Helene, with a few getting upwards of 30 inches. Here 7" of rain floods the whole south end of town to where you can't even get to the hospital. Mudslides close the mountain road access. I can't imagine what 15" inches would do... Once a single thunderstorm camped out on the mountain in the late 80s (dumped 10" of rain), and drained into the canyon, it took 3 years for them to reopen the canyon park due to how the mountain funnels the water.... The bridges were gone, the roads were gone, even railroad tracks were gone.
56" would wipe us off the map.
So today I spent the day hauling wood chips (our 4th truckload). I have been over the past two years trying to build up an embankment to keep the water from flooding our yard so bad during storms from the runoff from the ridge. I am sunburnt and tired.