Hurricane Sandy flooded big parts of lower Manhattan and Brooklyn. I have friends who couldn't go back to their apartments or offices for months afterwards.

That happened six years ago: https://www.businessinsider.com/severe-rainfall-hits-new-yor...

And last year: https://www.youtube.com/watch?v=CxqswOkZMSI

Hurricane Ida in 2019 brought torrential rains which flooded the city, especially the subway.

Torrential rain has nothing to do with sea rising which is the topic discussed at hand. You can have torrential rains anywhere in the world not just on the coastline.