Aerial Views Of Water Usage As The California Drought Continues

Black plastic balls, known as "shade balls," float in the Los Angeles Reservoir to protect water quality in compliance with EPA rules in this aerial photograph taken over Los Angeles, California, U.S., on Monday, Aug. 31, 2015. The U.S. Agriculture Department will steer $150 million in drought aid to California as the historic water shortage enters a fourth year. The drought has led the state's officials to impose mandatory water-use cuts of as much as 36 percent. Photographer: Patrick T. Fallon/Bloomberg via Getty Images