In 2014, in the middle of a severe drought that would test California’s complex water storage system like never before, voters told the state to borrow $7.5 billion and use part of it to build projects to stockpile more water.

Seven years later, that drought has come and gone, replaced by an even hotter and drier one that is draining the state’s reservoirs at an alarming rate. But none of the more than half-dozen water storage projects scheduled to receive that money have been built.