article_snippet: California is in the midst of a three year drought that has been caused by a combination of record high temperatures and sparse rainfall.
article_snippet: This has produced the worst conditions in 1,200 years, according to a study.
article_snippet: Experts predict it will take about 11 trillion gallons of water (42 cubic kilometers) -- around 1.5 times the maximum volume of the largest U.S. reservoir - for California to recover.
article_snippet: The dry bed of the Stevens Creek Reservoir in California: A combination of record high temperatures and sparse rainfall during California'sthree-year drought have produced the worst conditions in 1,200 years .