A drought sign is seen in a field near Buttonwillow, California April 20, 2015. With the country's most populous state entering the fourth year of a devastating drought, Governor Jerry Brown has ordered an overall 25 percent cut in urban water use though the first statewide mandatory reductions in California's history. The suppliers with the highest per capita water use would have to accept a 36 percent cut. Meanwhile, environmentalists and some urban dwellers say the state's $45 billion agriculture industry should bear a greater share of water savings, given its massive water use. REUTERS/Lucy Nicholson 

Jesus Rivera of Kennah Construction (L) works on a swimming pool demolition for a homeowner who is going to replace the pool with a drought resistant garden, in Lakewood, California April 21, 2015. With the country's most populous state entering the fourth year of a devastating drought, Governor Jerry Brown has ordered an overall 25 percent cut in urban water use though the first statewide mandatory reductions in California's history. The suppliers with the highest per capita water use would have to accept a 36 percent cut. Meanwhile, environmentalists and some urban dwellers say the state's $45 billion agriculture industry should bear a greater share of water savings, given its massive water use. REUTERS/Lucy Nicholson 

Ducks walk in front of a boat ramp on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

A Sparkletts bottled water delivery worker carries water to homes in Los Angeles, California April 17, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Department of Water and Power (DWP) Water Conservation Response Unit supervisor Enrique Silva (R) advises gardeners who were working at a home that had sprinklers operating on the wrong day of the week, as he patrols the streets looking for people wasting water during the drought in Los Angeles, California, April 17, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

A dry creek is seen in Lost Hills, California April 20, 2015. With the country's most populous state entering the fourth year of a devastating drought, Governor Jerry Brown has ordered an overall 25 percent cut in urban water use though the first statewide mandatory reductions in California's history. The suppliers with the highest per capita water use would have to accept a 36 percent cut. Meanwhile, environmentalists and some urban dwellers say the state's $45 billion agriculture industry should bear a greater share of water savings, given its massive water use. REUTERS/Lucy Nicholson 

Leaflets explaining new water rules are seen in the car of Enrique Silva, Department of Water and Power (DWP) Water Conservation Response Unit supervisor, as he patrols the streets looking for people wasting water during the drought in Los Angeles, California April 17, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Homes with swimming pools and boathouses built around an artificial lake are seen in Indio, California April 13, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. Picture taken April 13, 2015. REUTERS/Lucy Nicholson 

Abigail Beltran, 6, whose family's well has run dry, climbs on a water storage tank in her front yard in Porterville, California October 14, 2014. In one of the towns hardest hit by California's drought, the only way some residents can get water to flush the toilet is to drive to the fire station, hand-pump water into barrels and take it back home. The state's three-year drought comes into sharp focus in Tulare County, the dairy and citrus heart of the state's vast agricultural belt, where more than 500 wells have dried up. Picture taken October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT SOCIETY)

ATTENTION EDITORS - PICTURE 10 OF 12 FOR WIDER IMAGE STORY 'WHEN THE WELL RUNS DRY'
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A group of tule elk graze on the lawn of a home on D Ranch in Point Reyes National Seashore, California April 9, 2015. A herd of tule elk move warily along a California coastal hill as a herd of Black Angus cattle graze nearby. Despite the apparent peaceful coexistence, the animals are at the center of a battle for precious grasslands reduced by the state's drought. Ranchers and farmers who live and work within Point Reyes National Seashore want the free-roaming elk fenced in so their livestock do not have to compete for grass. Wildlife advocates and many park users are opposed after almost half of the majestic elks died while living in a fenced-in area in the northern part of the park. Picture taken April 9. To match Feature USA-ELK/CALIFORNIA REUTERS/Robert Galbraith 

Macario Beltran, 41, (C) a mechanic whose family's well has run dry, fills containers in his truck with water from the fire station, with his daughters Abigail, 6, (L) and Denika, 10, in Porterville, California October 14, 2014. In one of the towns hardest hit by California's drought, the only way some residents can get water to flush the toilet is to drive to the fire station, hand-pump water into barrels and take it back home. The state's three-year drought comes into sharp focus in Tulare County, the dairy and citrus heart of the state's vast agricultural belt, where more than 500 wells have dried up. Picture taken October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT SOCIETY TPX IMAGES OF THE DAY TRANSPORT)

ATTENTION EDITORS - PICTURE 12 OF 12 FOR WIDER IMAGE STORY 'WHEN THE WELL RUNS DRY'
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Water and mud blow out of the top of a drill, as Diamond Well Drillers drill to deepen the Brady family well in Woodland, California, August 20, 2014. The Bradys' home well went dry almost two months ago and Theresa Brady called 65 well drillers before finding one available to deepen their well. REUTERS/Max Whittaker (UNITED STATES - Tags: ENVIRONMENT BUSINESS INDUSTRIAL SOCIETY) 

Shells are seen on a former lake bed from where the water receded at Lake Cachuma in Santa Barbara, California March 27, 2015. California Governor Jerry Brown signed emergency legislation on Friday that fast-tracks over $1 billion in funding for drought relief and water infrastructure within the parched state. California is in its fourth year of a record-breaking drought. REUTERS/Lucy Nicholson 

Visitors look over the foundation of a structure from the Gold Rush era town of Mormon Island, uncovered by receding waters at Folsom Lake, which is 17 percent of its capacity, in Folsom, California January 22, 2014. California Governor Jerry Brown last week declared a drought emergency, and the dry year of 2013 has left fresh water reservoirs with a fraction of their normal water reserves. Picture taken January 22, 2014. REUTERS/Robert Galbraith (UNITED STATES - Tags: ENVIRONMENT) 

A dry dock is seen from an area that was previously underwater at Lake Cachuma in Santa Barbara, California March 27, 2015. California Governor Jerry Brown signed emergency legislation on Friday that fast-tracks over $1 billion in funding for drought relief and water infrastructure within the parched state. California is in its fourth year of a record-breaking drought. REUTERS/Lucy Nicholson 

Docks that collapsed when the water receded are seen at Lake Cachuma in Santa Barbara, California March 27, 2015. California Governor Jerry Brown signed emergency legislation on Friday that fast-tracks over $1 billion in funding for drought relief and water infrastructure within the parched state. California is in its fourth year of a record-breaking drought. REUTERS/Lucy Nicholson 

Boats sit at the former high water mark at Castaic Lake reservoir in Castaic, California April 15, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

A pipe sits on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Rusty boat moorings lie on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

A piece of rusty metal lies on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Water level marks are seen around the banks of Lake Casitas, which is at around 50% of its capacity, in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Ducks walk on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Boat ramps sit on the dry bed of a part of Lake Casitas that was formerly under water in Ojai, California April 16, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

People play golf on a course in La Quinta, California April 13, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. Picture taken April 13, 2015. REUTERS/Lucy Nicholson 

Dry earth is seen between rows of grapevines in Napa, California April 9, 2015. The state is in the fourth year of one of the worst droughts on record. REUTERS/Elijah Nouvelage 

A visitor walks near the receding waters at Folsom Lake, which is 17 percent of its capacity, in Folsom, California January 22, 2014. California Governor Jerry Brown last week declared a drought emergency, and the dry year of 2013 has left fresh water reservoirs with a fraction of their normal water reserves. Picture taken January 22, 2014. REUTERS/Robert Galbraith (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

A man waters down the sidewalk outside Taco Bell in Los Angeles, California April 15, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

Angelica Gallegos, 37, whose well has run dry, chops vegetables as she stands next to her sink where she washes dishes with bottled water in Porterville, California October 14, 2014. Picture taken October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT) 

A boat paddle is shown on the bottom of the nearly dry Almaden Reservoir near San Jose, California January 21, 2014. California Governor Jerry Brown last week declared a drought emergency, and the dry year of 2013 has left fresh water reservoirs with a fraction of their normal water reserves. REUTERS/Robert Galbraith (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

Firefighters battle a blaze in San Marcos, California May 14, 2014. More than 20 structures, including several homes, burned to the ground and thousands of people were ordered to evacuate on Wednesday, as a wind-lashed wildfire roared out of control in the heart of a Southern California coastal community. The so-called Poinsettia Fire, which erupted shortly before 11 a.m. in Carlsbad, some 25 miles north of San Diego, quickly became the most pressing battle for crews fighting flames across the region amid soaring temperatures and hot Santa Ana winds. REUTERS/Sam Hodgson (UNITED STATES - Tags: ENVIRONMENT DISASTER TPX IMAGES OF THE DAY) 

The shadow of an Osprey aircraft carrying the White House press pool falls upon a farm field near Fresno, California February 14, 2014. President Barack Obama will pledge on Friday to speed federal assistance to help California recover from a crippling drought that is threatening the critical agriculture industry in the No. 1 farm state. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ENVIRONMENT AGRICULTURE TRANSPORT TPX IMAGES OF THE DAY) 

Drew McClellan of A lucky Lawn and his wife Deb paint green dye onto drought affected grass at a home in Santa Fe Springs, California October 1, 2014. McClellan's small business has taken-off as home owners are preferring to dye their lawns green than face water restrictions and a rising water bill as California deals with one of the worst droughts in its history. REUTERS/Mike Blake (UNITED STATES - Tags: BUSINESS ENVIRONMENT SOCIETY) 

A sign advising to pray for rain hangs above an exhibit area at the 47th Annual World Ag Expo in Tulare, California, February 12, 2014. The expo takes place as a third year of drought plagues California farmers with the driest year on record and prompting California Governor Jerry Brown to declare a statewide drought emergency. Picture taken on February 12, 2014. REUTERS/David McNew (UNITED STATES - Tags: AGRICULTURE ENVIRONMENT) 

A sprinkler runs and water flows down a driveway on a mandatory "no watering" day in Sacramento, California, August 15, 2014. Penalties for illegal watering in Sacramento range from a warning for the first violation to a $1000 fine for the fourth violation. Water regulators in California approved tough new conservation measures last month to limit outdoor water use. California is in the third year of a catastrophic drought that has diminished the Sierra Nevada snow pack, which normally feeds the state's rivers and streams with cool water. REUTERS/Max Whittaker (UNITED STATES - Tags: ENVIRONMENT) 

People evacuate from their homes as a wildfire driven by fierce Santa Ana winds closes in on them in Rancho Cucamonga, California, April 30, 2014. The wind-driven brush fire burning out of control in drought-parched Southern California wildland on Wednesday forced the evacuation of about 1,000 residents north of the town of Rancho Cucamonga, officials said. REUTERS/David McNew (UNITED STATES - Tags: DISASTER ANIMALS TPX IMAGES OF THE DAY) 

A buoy is seen where the water receded at Lake Cachuma in Santa Barbara, California March 27, 2015. California Governor Jerry Brown signed emergency legislation on Friday that fast-tracks over $1 billion in funding for drought relief and water infrastructure within the parched state. California is in its fourth year of a record-breaking drought. REUTERS/Lucy Nicholson 

Thousands of juvenile salmon are dispatched into a holding tank in the Sacramento River in Rio Vista, California March 25, 2014. The salmon were trucked more than 200 miles (321 km) from a hatchery on the northern part of the river, as drought conditions in the state have made the river impassable to the young fish. REUTERS/Robert Galbraith (UNITED STATES - Tags: ENVIRONMENT ANIMALS) 

Underweight cattle are held for auction at Cattlemen's Livestock Auction in Galt, California, February 12, 2014. California's drought has led many ranchers to sell their cattle, often to buyers further east, as grazing land becomes barren and hay becomes scarce and expensive. Picture taken February 12, 2014. REUTERS/Max Whittaker (UNITED STATES - Tags: ANIMALS ENVIRONMENT) 

A digital traffic sign usually used for commuter travel information informs travellers southbound on interstate highway 5 to conserve water as they pass through Del Mar, California September 10, 2014. California is in its third year of a devastating drought that has forced farmers to leave fields unplanted and left communities reliant on well water with little to drink.
REUTERS/Mike Blake (UNITED STATES - Tags: TRANSPORT DISASTER ENVIRONMENT ENERGY) 

A fountain outside City Hall is shut down due to the drought, in downtown Los Angeles, California, January 6, 2015. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT) 

A man stands in an empty public swimming pool in Burbank, Los Angeles, California March 19, 2015. California Governor Jerry Brown and top lawmakers on Thursday announced a $1 billion emergency legislative package to deal with the state's devastating multi-year drought. The state is entering the fourth year of record-breaking drought that has prompted officials to sharply reduce water supplies to farmers and impose strict conservation measures statewide. REUTERS/Lucy Nicholson 

Patchy snow covers a meadow in Phillips, California where the California Department of Water Resources measured the snowpack on January 29, 2015. The reading at Phillips is 2.3 inches of water equivalent, 12% of the historic average for this location. REUTERS/Max Whittaker (UNITED STATES - Tags: ENVIRONMENT) 

Pastor Frankie Olmedo, 56, (L) who volunteers four hours a day to hand out water, hands bottles to Luis Bocanegra, 35, in Porterville, California October 14, 2014. Picture taken October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT RELIGION) 

Houseboats sit on Lake Kaweah, well below the visible high-water mark in Lemon Cove, California January 17, 2015. A combination of record high temperatures and sparse rainfall during California's three-year drought have produced the worst conditions in 1,200 years, according to a study accepted for publication by the American Geophysical Union (AGU). Picture taken January 17, 2015. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT) 

Pastor Frankie Olmedo, 56, (L) who volunteers four hours a day to hand out water, fills up a container for Luis Bocanegra, 35, in Porterville, California October 14, 2014. In one of the towns hardest hit by California's drought, the only way some residents can get water to flush the toilet is to drive to the fire station, hand-pump water into barrels and take it back home. The state's three-year drought comes into sharp focus in Tulare County, the dairy and citrus heart of the state's vast agricultural belt, where more than 500 wells have dried up. Picture taken October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT SOCIETY RELIGION)

ATTENTION EDITORS - PICTURE 07 OF 12 FOR WIDER IMAGE STORY 'WHEN THE WELL RUNS DRY'
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City of Sacramento water conservation representative Steven Upton photographs a Sacramento, California home that has evidence of watering on a mandatory "no watering" day, August 15, 2014. Penalties for illegal watering in Sacramento range from a warning for the first violation to a $1000 fine for the fourth violation. Water regulators in California approved tough new conservation measures last month to limit outdoor water use. California is in the third year of a catastrophic drought that has diminished the Sierra Nevada snow pack, which normally feeds the state's rivers and streams with cool water. REUTERS/Max Whittaker (UNITED STATES - Tags: ENVIRONMENT) 

A section of the California aqueduct is pictured in Palmdale, California April 7, 2015. A spring storm was expected to bring several inches of rain to some areas of drought-parched California and up to two feet of snow to mountains beginning late on Monday, just days after Governor Jerry Brown ordered sweeping cuts in water use. REUTERS/Mario Anzuoni 

Ranch hand Ricardo Madrigal feeds cattle on the Van Vleck Ranch in Rancho Murieta, California, February 12, 2014. California's ongoing drought has greatly increased feed costs for ranchers, forcing some to sell their cattle. The Van Vleck ranch has been feeding $1200 worth of hay per day, whereas in a normal year the cows would feed on grass for free. REUTERS/Max Whittaker (UNITED STATES - Tags: ANIMALS AGRICULTURE SOCIETY BUSINESS) 

Marisela Corona, 26, whose well has run dry, pours water from a tank on her back porch in Porterville, California October 14, 2014. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT) 

The Cascades of the Los Angeles-Owens River Aqueduct, which carries millions of gallons of water over 374 km (233 miles) to supply the city of Los Angeles, are seen in Sylmar, California April 15, 2015. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. REUTERS/Lucy Nicholson 

A tractor collects golf balls on a driving range in the Palm Springs area, California April 13, 2015. The average daily water usage per person in Palm Springs is 201 gallons, more than double the California average. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. Picture taken April 13, 2015. REUTERS/Lucy Nicholson TPX IMAGES OF THE DAY FOR BEST QUALITY IMAGE ALSO SEE: GM1EB5D0S6I01 

Homes with swimming pools are seen in the Palm Springs area, California April 13, 2015. The average daily water usage per person in Palm Springs is 201 gallons, more than double the California average. California's cities and towns would be required to cut their water usage by up to 35 percent or face steep fines under proposed new rules, the state's first-ever mandatory cutbacks in urban water use as the state enters its fourth year of severe drought. Communities where residential customers use more than 165 gallons of water per person per day would have to cut back by 35 percent. Picture taken April 13, 2015. REUTERS/Lucy Nicholson