Foreverlad

Out of curiosity, were any of the roots visible above the soil line before the accident? It's hard to tell from your photos. At a guess, I'd say the corm was very close to the surface and roots were just barely submerged in soil.

Not that there's anything wrong with that on a potted banana, but from your own experience, I'm sure you can appreciate the value in potting a banana slightly deeper =)

Edit: btw- I notice some of your older leaves have large black spots on them. I just recently came across this in another post on another forum re: bananas. Was your pot completely saturated prior to the storm? Trying to discern the cause for blackening of leaves.