Well, it seems that Mohammed is more of a prognositcator than Nostradamus. As he only prophesized the destruction of the west coast by an earth quake sometime in the next 10 years, not the exact date.
I think that clown has been smoking a little too much hashish. The US is 3000 miles wide. For a single Tsunami to wash over the rockies and the appalachians, the rest of the world would be smoking ruins from either the meteor or the SuperVolcano. Drowning would be the least of our worries at that point.