Violent storms continue to rake large portions of the California coast, causing heavy rainfall, mass flooding, wind damage, and up to 12 deaths. The storms started as a "bomb cyclone" over New Year's weekend and seem to have not leveled off. On Sunday, President Joe Biden declared a federal emergency in California. Virginia Tech geophysicist Manoochehr Shirzaei has been closely tracking the storm system via satellite radar imagery. His main concern: outdated levees.