In the scenario you describe? Basically, say goodbye.

Look, in any major east coast city, under NORMAL conditions, you can't get from A to B in a reasonable amount of time.

Here's an example.
On this map
the BLUE line represents the distance covered in the first hour of my drive IN to NY.
The RED line represents the distance covered in the SECOND hour.



It's actually worse coming home, as there's a huge slowdown due to construction westbound on Rt. 78.

My chances are better in NYC trying to go UP and hoping for the best, rather than going to lower ground to the west and hoping to make it to higher ground somewhere around Rt. 287.

My plan? Get as much food and water as possible UP as high as I can find a place to be, and improvise. Ham radio might be handy here too, time to get my 6 meter stuff in order, I suspect.

You're talking about a situation with 20 to 30 million dead - at least. I mean, if a 25 meter water wall overtopped all of Florida, and, let's say. 50% of the population survived that, that's 9 million dead in FLORIDA alone. Something like 60% of the population of the US lives along the coasts, you're not even able to make a rational guess (despite my previous guess) as to what happens when a wave 82 feet high hits the shore. 82 FEET! Just to give some perspective, the tsunami that hit Indonesia was about 30 feet tall in Sumatra. 200,000 people died in the 2004 Tsunami.