Have you heard of “storm surges”?

I didn’t say NYC would be flooded, I said it would have significantly more sandy-like events (where the storm surge was already 3-4m in battery park city).[1]

And I don’t know how much you know about tides given your above comment, but starting out a meter higher usually has nonlinear effects on how far inland waves can travel.

[1] https://www.ncdc.noaa.gov/sotc/national/2012/10/supplemental...