Disastrous Megaflood Coming To California: Experts

CBS Local Digital Media personalizes the global reach of CBS-owned and operated television and radio stations with a local perspective.CALIFORNIA — It's not an earthquake. And it isn't the mega drought. It's actually the exact opposite. A megaflood.

A new study by Science Advances shows climate change has already doubled the chances of a disastrous flood happening in California in the next four decades. And experts say it would be unlike anything anyone alive today has ever experienced.

Daniel Swain, a climate scientist with UCLA and a researcher involved in the study, describes a megaflood as, "a very severe flood event across a broad region that has the potential to bring catastrophic impacts to society in the areas affected." He said a megaflood is similar to the 1,000-year flash flood events seen this summer in the St. Louis area and Kentucky, but across a much wider area, such as the entire state of California.

These massive floods, which experts say would turn California's lowlands into a "vast inland sea," might have previously happened once in a lifetime in the state. But experts say climate change is increasing the likelihood of these catastrophic disasters, causing them to occur more like every 25 to 50 years.

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