The present four-year California drought is not novel — even if President Barack Obama and California governor Jerry Brown have blamed it on man-made climate change. According to the National Oceanic and Atmospheric Administration, California droughts are both age-old and common. Predictable California dry spells — like those of 1929–34, 1976–77, and 1987–92 — are more likely result from poorly understood but temporary changes in atmospheric pressures and ocean temperatures. What is new is that the state has never had 40 million residents during a drought — well over 10 million more than during the last dry spell in the early 1990s.
Much of the growth is due to massive and recent immigration. A record one in four current Californians was not born in the United States, according to the nonpartisan Public Policy Institute of California. Whatever one’s view on immigration, it is ironic to encourage millions of newcomers to settle in the state without first making commensurately liberal investments for them in water supplies and infrastructure. Sharp rises in population still would not have mattered much had state authorities just followed their forbearers’ advice to continually increase water storage.