Study Warns California , Continues to Face , Threat of Megadrought.br 'Newsweek' reports that California may br not have cured the state's water woes, br despite several years of snow-heavy winters. .br According to NASA satellite data, recent snowfall has been insufficient to offset the impact of an ongoing megadrought across the western states. .br A new paper published in the journal, 'Geophysical Research br Letters', details how groundwater supplies remain br concerning for both domestic and agricultural use.br Gravity Recovery and Climate Experiment (GRACE) satellites br revealed that the entire Great Basin groundwater supply br has dropped by 16.5 cubic miles in the last 20 years.br The data highlights that while snowmelt does br help resupply groundwater levels, it is not br enough to replenish the current diminished levels.br In years like the 2022-23 winter, br I expected that the record amount br of snowfall would really help to br replenish the groundwater supply. br But overall, the decline continued, Dorothy Hall, Study co-author and University br of Maryland earth scientist, via NASA statement.br 'Newsweek' reports that the U.S. southwest br has been facing a megadrought since br the beginning of the millennium. .br A megadrought is a drought br that lasts two or more decades. , Jonathan Overpeck, Dean of environmental studies at the University of Michigan, via 'Newsweek'.br The current southwest br megadrought started in 1999 br and has become the longest br drought in U.S. history, and also the br most severe in at least 1,200 years, Jonathan Overpeck, Dean of environmental studies at the University of Michigan, via 'Newsweek'.br With the ongoing threat of br drought, farmers downstream br often can't get enough water.