California's water supply vulnerable to quakes, floods

The California Department of Water Resources has just released a study that concludes there is a 40 percent chance that a major earthquake will flood 27 delta islands between now and 2030, costing billions in repairs and knocking out the water source for 25 million Californians for more than a year.

Without intervention, it is estimated that about 140 levees of California's could fail in the next century due to storms or rising seas. An earthquake of magnitude 6.7 or greater could result in fatalities, flooding of islands and costs of $15 billion. In California levees have failed about 160 times in the past 109 years. READ MORE

California Department of Water Resources: Delta Risk Management Strategy - Final Phase 1 Report