evidence: Sea level rise could drastically erode California beaches by the end of the century [...] Using nearly four decades of satellite images, models of predicted sea level rise and global wave patterns, the researchers estimate 24 to 75% of California's beaches "may become completely eroded" by 2100. [...] The California Ocean Protection Council, a cabinet-level state agency, anticipates sea levels in California may rise anywhere from two to seven feet, between now and 2100. Some researchers warn of up to 10 feet in worst case scenarios.