My understanding of the traditional Jewish understanding is that the Flood was universal (except for 'Eretz Yisra'el, which was exempt so the bodies of the dead there could be buried appropriately and not defile the land) and consisted of hot, boiling water (those in Israel were killed by the heat). All the mountains were covered and the laws of nature were suspended for the year that the waters were on the earth.
I am not an expert here. A traditional Orthodox rabbi should be consulted.
My apologies. I was pinging you to my reply to Alex Murphy which was inspired by the article you wrote (and he linked for my perusal) vis-a-vis this one.