What Causes Droughts in California?

The drought is believed to be caused in part by a mass of warm water in the Pacific Ocean that has drifted closer to the West Coast recently. ... During this drought, California has had record-high temperatures and record-low snowpack depths.

What is causing the drought in California?

Scientists say California's parched plight largely comes down to two words: “atmospheric river.” An increasing body of research is showing that the state's water supply each year depends almost entirely on a handful of big make-or-break storms. And the last two winters, too few arrived.

What are the main causes of drought?