Martin,

If you can get to the Short Hills Mall on 24, where it splits off Rt 78 westbound, you can hang at the Short Hills Hilton. The elevation there is sufficient to protect against a tsunami incident, and I think you will like the digs. From Holland Tunnel, it takes me about 1 1/2 hours in heavy traffic to get there. If you take the NJT Morristown train you can stop at Summit and you're within 5 miles of the hotel, or you could hang out in beautiful downtown Summit for a while. In fact, anything west of Summit on 24 would be up high enough. The really high point is south of Summit across 78 heading for 22. If you manage to get to the top of that hill, there are clear views all the way back to Manhattan, and there's a big park right there to hang out in as well.

If I had my druthers, I guess I would hang out at the Westin in Times Square. You're on the west side of the island, but not too close to the Hudson, and far enough north that most of the power of the wave should be spent by then, so it is just flooding that you have to contend with. That place is recent construction and built to withstand some serious stress, so it should weather well. Once the show's over, you have access to their rooftop, which I know is capable of helo landing (one of the few in the area), and evac would be like that at the end of the movie "The Day After Tomorrow".