California Drought Warnings

January through May 2013 were California’s driest in about 90 years of record keeping.

Currently the San Luis Reservoir, which gets water from the Sacramento-San Joaquin River Delta, is only 22 percent of its historical average for this time of year.


California’s other main source of water comes via the Colorado River Basin, originating in the Rocky Mountains. More than a decade of drought has left both Lake Powell and Lake Mead less than half full. About a quarter of urban Southern California depends on these reservoirs for supply.

Climate Progress

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