https://www.mercurynews.com/2021/04/13/san-francisco-bay-protection-from-future-disasters-is-being-thrown-away-scientists-say/

For more than 100 years after California’s Gold Rush, developers and city leaders filled in San Francisco Bay, shrinking it by one third to build farms, freeways, airports and subdivisions.

All that changed in the 1970s with modern environmental laws. But now as sea level rise threatens to cause billions of dollars of flooding in the coming decades, the bay is going to need to be filled again — but this time in a different way, according to a new scientific report out Tuesday.