In fact in some regions it's much worse than a permanent increase in tide and storm surge levels, some cities are already almost certainly irreversibly lost to the sea
today (in an irreversible process that takes 3-5 decades to play out), such as big parts of Miami and all low lying areas of Florida:
The reason is that the Florida peninsula is a porous plateau of karst limestone, the pressure from the rising sea waters comes from below through the spongy bedrock and rises the table of groundwater, sea level rise cannot be protected against with sea walls, dikes, dams and pumping stations like for example the low lying areas in the Netherlands are protected against:
Due to Florida's unique geology I believe there's no currently known technology to save much of Florida against sea level rise caused by the CO₂ already present in the atmosphere.
The first map above is for 100 cm rise - a ~300 cm rise in 50 years, as some updated models suggest, will have approximately this effect:
Y
Tesla should plan the location of new manufacturing facilities accordingly. Shanghai looks pretty safe, for most parts.