I live in Ballard, a neighborhood of Seattle, which is right on the ocean. If and as sea levels rise, every single person here would be better off running away from their homes, abandoning everything they own and starting from scratch somewhere inland.
For each of us, even this would be better than abandoning industrial civilization, which is the thing that gives us hospitals, abundant food, clothing, shelter, clean/hot/cold water, and everything else needed for a good human life.