It was hardly an "event". Flooding not based on sudden and unexpected events occurring without warning - "erosion based" in some way - does not look fast enough to generate such stories. You are talking about increases in the water level smaller and slower than ordinary storm and wind and and wave and tidal surges provide - daily and seasonal events. The notion that such long term one way progressions would even be interpreted as a "flood" is problematic, the idea that people living on the ocean - maritime cultures - would be caught short, with no time to move possessions or even apparently find their boats, drowned by the hundreds, in the course of a moderate and easily observed (forewarned) long term rise in the water levels along the shore like that, just strikes me as implausible, is all. But then, who knows?