If you currently own real estate to the north of Whittier Boulevard, you're in luck. Should sea levels rise by 60 meters - that's almost 200 feet, you are the proud owner of prime oceanside property.
However, don't get too eager. Kenneth Miller of Rutgers University says "The natural state of the Earth with present carbon dioxide levels is one with sea levels about 70 feet higher than now." Miller and his colleagues estimated* global sea levels 2.7 to 3.2 million years ago during the Pliocene Era when the concentration of CO2 in the atmosphere was the same as today's.
In that case, Bellflower, Paramount, and Compton residents can enjoy a walk to the beach several hundred years from now.
*High tide of the warm Pliocene: Implications of global sea level for Antarctic deglaciation, Kenneth G. Miller, James D. Wright, James V. Browning, Andrew Kulpecz, Michelle Kominz, Tim R. Naish, Benjamin S. Cramer, Yair Rosenthal, W. Richard Peltier, and Sindia Sosdian, Geology, March 19, 2012. http://geology.gsapubs.org/content/early/2012/03/16/G32869.1.abstract.