Great point.
Portland ME- - Over 1 in 6 chance sea level rise + storm surge + tide will overtop -
I can tell you on any given day for the last 40 years a storm surge has a better than 1 in 6 chance of coming over the average New England seawall.
The storms are called Northeasters for a reason. Storms frequently get up into the Gulf of Maine and sit there pounding a northeast wind into the coast.
Combine that with a lunar high tide and a big storm surge is coming.