Scientists are warning that the “big one” could hit California in the next 40 years, but they’re not talking about an earthquake. They’re talking about a megaflood. Marianne Favro reports. Stay connected: Follow us on Twitter: http://www.twitter.com/nbcbayarea Like us on Facebook: http://www.facebook.com/nbcbayarea Follow us on Instagram: http://www.instagram.com/nbcbayarea Follow us on …
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