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Workers pick asparagus at Del Bosque Farms Inc. in Firebaugh, California, U.S., on Monday, April 6, 2015. California lawmakers approved legislation sought by Governor Jerry Brown that authorizes spending $1 billion to manage the drought gripping the most populous U.S. state for a fourth year. Photographer: David Paul Morris/Bloomberg via Getty Images

Workers pick asparagus at Del Bosque Farms Inc. in Firebaugh, California, U.S., on Monday, April 6, 2015. California lawmakers approved legislation sought by Governor Jerry Brown that authorizes spending $1 billion to manage the drought gripping the most populous U.S. state for a fourth year. Photographer: David Paul Morris/Bloomberg via Getty Images