The other ‘big one’: How a megaflood could swamp California’s Central Valley
Sediment research has found that six storms similar to or even more severe than the 1861-62 storm hit California in the past 2,000 years, arriving about every 200 to 400 years…. Given this history, it is inevitable that another great flood will hit the state someday, and climate change is thought to boost the odds of such an event. And when the next great flood comes, the damages could well dwarf those of any previous global weather disaster, adding up to more than $1 trillion — an extraordinary catastrophe with triple the cost of the feared great quake on the San Andreas fault.
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