A cataclysmic flood is coming for California. Climate change makes it more likely.
When the big flood comes, it will threaten millions of people, the world's fifth-largest economy and an area that produces a quarter of the nation's food. Parts of California's capital will be underwater. The state's crop-crossed Central Valley will be an inland sea.
The scenario, dubbed the "ARkStorm scenario" by researchers from the U.S. Geological Survey's Multi Hazards Demonstration Project, is an eventuality. It will happen, according to new research.
