Being positioned close to the New England states, which will experience a bounce up as the St. Lawrence Seaway rips further apart, just prior to the shift, New York State will be relatively safe from flooding from the Seaway. As with Canada on the opposite side of the Seaway, the release of tension when the Atlantic and the Seaway rip will allow bordering land, light in nature, to lift. Flooding will come in from the coast, where the usual warnings about tidal waves are in effect. Stay inland at least 100 miles, be 200 feet above sea level, and consider tidal core or flooding of local rivers overwhelmed by torrential downpours or sloshing of local lakes. The finger lakes, created when the land was stretched during the creating of the St. Lawrence Seaway in the past, will if anything deepen, allowing the water level to temporarily drop, when the St. Lawrence Seaway once again is pulled apart.
Note St. Lawrence Seaway commentary.
Note East Coast Migration commentary.