Environment & Energy

Even the parts built up with fill have solid bedrock under them. Marina, Foster City. That being said to protect from sea level rise you, at some point will have to put in levies or raise the coastline of the bay. Three feet won't be too bad but you will get salt water intrusion further up the two rivers which feed the area. Decisions on what to save and what to defend will have to be made. And should probably be being made now.
The real problem comes further down the the time line. Some scientists believe that we have baked in somewhere between 100 to 200 ft., or more of sea level rise based on ocean levels when there was this much CO2 in the air before. At 200 feet the vast majorityh of FL is gone. Most of NYC. Pretty much all coastal cities will be compleatly inundated. We have destroyed the world as we knew it. Us living now won't see it happen but our great grandchildren will have to live it.