BIG/ONE/Sherwood Design EngineersLike most US coastal regions, the San Francisco Bay Area is under threat from rising seas. To make matters worse, researchers say that parts of the Bay Area are sinking, which could wipe out between 20 and 165 square miles of coastal land, along with the communities that live there. Instead of fighting the rising tides, a group of architects and urban designers want locals to live in harmony with the Bay.