The picture from “CCO Public Domain” is from a large single wave, like found during surfing competitions where waves repeat every minute, or so.. The movies of the recent tsunami in Japan indicated a much more slowly rising water level that an aware person could outrun if he had his wits about him, and had a place on higher ground to go to.
Obviously we watched different videos of the Japanese (and maybe Indonesian) tsunamis. There's a long pullback (tsunami means something like "big wave in port") which leaves the usual beaches high and dry for a short period, strands boats, that kind of thing, then the water rises relentlessly, arriving with a rush and roar.
I think we are talking about Noah’s Great Flood, my FRiend, which you have exactlyu described.