As 2018 was winding down, one of California’s leading newspapers suggested, via a front-page, banner-headlined article, that the drought that had plagued the state for much of this decade may be returning. Just weeks later, that same newspaper was reporting that record-level midwinter storms were choking mountain passes with snow, rapidly filling reservoirs and causing serious local flooding. Neither was incorrect at the time, but their juxtaposition underscores the unpredictable nature of California’s water supply. The fickleness of nature has been compounded by a decades-long, multi-front struggle among hundreds of water agencies and other interested parties over allocations of the precious liquid, not unlike the perpetual religious and ethnic wars that consumed medieval Europe.