Attention, Silicon Valley: You Might Return to Sea Old levees need $1B upgrade to protect Facebook, Google, et al By John Johnson, Newser Staff Posted Apr 12, 2012 4:44 PM CDT 5 comments Comments This file photo shows the exterior of Facebook headquarters in Palo Alto, Calif. (AP Photo/Paul Sakuma) (Newser) – It might just be the only thing that could take down Facebook and Google in one fell swoop: some good old-fashioned biblical flooding. As the AP explains, a chunk of Silicon Valley sits on land that used to be part of San Francisco Bay. Which is fine except for two things: Sea levels keep rising, and the levees designed to keep the water out are about a century old. Officials figure they'll need $1 billion to get the levees up to snuff, and Sen. Dianne Feinstein was meeting with a coalition of local business leaders today to talk about funding. (Facebook, of course, throws around that kind of money just to buy nifty apps.) One coalition member estimates that about three-quarters of the money would come from the federal and state government.