This prophecy predicts a major tsunami of never before seen size hitting New York City and parts of the East Coast causing massive damage on a biblical scale. This is potentially connected with the "Meteor Destruction of America" prophecy, as well as *possibly* the New Madrid Earthquake prophesy, although it doesn't necessarily have to be as there are plenty of other sources from which this event could originate. This prophecy also may not have a literal fulfillment in the form of a tsunami. While many of those who have seen this, either in dreams or visions, declare that it will be literal, it could possibly also be symbolic. Some of my reasons for saying this is because of all the talk recently about a "Red Wave", "Red Tsunami" and others. A "tsunami", in symbolic terms, is a sudden and dramatic change of substantial size. If it's meaning is symbolic, it may signal or symbolize a sudden political shifting in this nation occurring along both coastlines that are traditionally majority Democrat. I'm not saying that's what this is, as we don't know for certain yet. All I'm saying is, that's one possible interpretation of this at the moment. If I see things become more defined and certain at a later time, I'll update things as I always do.
EDIT (2020-11-11): While there is more than ample proof that this prophecy is entirely literal, recent events have lead me to believe it may also, or instead, have a figurative or symbolic meaning rather than a literal one.
(*Do you have a better description, or did you find an error? Please let me know.