This July 23, 2015 photo provided by the California Department of Water Resources shows The Russell Avenue bridge, over the Delta Mendota Canal in Firebaugh, Calif., The  drought has caused the bridge to subside until there's almost no space between bottom of bridge decking and canal water surface. A NASA scientist says in a report released Wednesday, Aug. 19, 2015 that parts of California's Central Valley are sinking faster than ever as groundwater is being pumped during the state's historic drought. (Florence Low/ California Department of Water Resources via AP)
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