They grow Zinfandel, Viognier, Cabernet, Merlot, and Petite Syrah grapes but are best known in this area of Central California for a blend called The Crash, named after a remarkable incident in 1956, when a B-26 crash-landed 200 yards from the family home. Now a new crash threatens, as groundwater levels beneath the vineyards plummet. California produces nearly half of U.S.-grown fruits, nuts, and vegetables, according to the state’s Department of Food and Agriculture.