San Francisco: a beloved city famous for its cable cars, its Chinatown, and the Golden Gate Bridge. Seven hundred and fifty thousand people live there, drawn to its quality of life. But it's a dream life that could turn into a nightmare at any moment.
Scientists believe there's a 62-percent chance the San Francisco Bay Area will be hit by a devastating earthquake sometime in the next 30 years. There will be no advance warning; unlike hurricanes and tornados, earthquakes cannot be predicted. The level of destructive energy unleashed by the coming quake will be more powerful than several hundred atomic bombs.