Islands in the Mediterranean, which will slosh during the shift like any large body of water, will be run over with waves, often arriving from different directions at once and clashing on top of the island, the roiling water sweeping any hapless humans clinging to high points away, washing the islands clean. Where water assaulting coastlines comes from a single direction, where a coastal river empties and is subject to flooding from torrential rains, there is this clash of water. But small islands such as those in the Mediterranean will find they are on occasion in the middle of a clash. When water has no where to go, it goes up, to a degree that would astonish mankind not witness to such a cataclysm during their lifetimes or much in their written history. Those who witnessed this behavior of water in the past, drown.