Sea level rise is one of the many threats we face as Earth’s climate changes. … The worry there is obvious for coastal communities in California. But the sea-level rise is something that could affect all Californians because of where that rising seawater would end up: the Central Delta. … The Delta’s complex network of waterways is home to a diverse ecosystem. It also serves 750,000 acres of farmland with fresh water. Drinking water is also sent through the Delta to the State Water Project system in Southern California.