You’ve heard of The Big One. Now meet The Other Big One – a massive statewide flooding catastrophe that could cripple California for months or years. Researchers think a megaflood is just as likely to hit the state as a 7.8 magnitude earthquake, and has the potential to cause three times as much damage. San Diego County alone would suffer $25 billion in losses under a doomsday “atmospheric river” scenario created in 2011 by dozens of researchers during which a series of heavy storms would slam the northern and central parts of the state.