California has been slow to address the problem. Consider that the "... Central Valley has been sinking ... since the 1920s and is estimated to have sunk up to

California has been slow to address the problem. Consider that the "... Central Valley has been sinking ... since the 1920s and is estimated to have sunk up to 28 feet. During drought years, the valley is prone to accelerated subsidence": https://en.wikipedia.org/wiki/Central_Valley_land_subsidence https://en.wikipedia.org/wiki/Central_Valley_land_subsidence As far back as 1988 there was scientific consensus that the earth was on a trajectory toward a doubling of CO2 levels and by 2001 the IPCC said "it was much more likely than not that our civilization faced severe global warming": https://www.scientificamerican.com/article/discovery-of-global-warming/ https://www.scientificamerican.com/article/discovery-of-glob... California's government has officially acknowledged global warming since at least 2006: https://ww3.arb.ca.gov/cc/ab32/ab32.htm https://ww3.arb.ca.gov/cc/ab32/ab32.htm Also in 2006, the Union of Concerned Scientists noted that global warming would impact future water supply by reducing the Sierra Nevada snowpack: https://www.ucsusa.org/global_warming/science_and_impacts/impacts/ca-global-warming-impacts.html https://www.ucsusa.org/global_warming/science_and_impacts/im... About 30 million Californians rely at least partially upon groundwater sources for their water, but the state didn't get around to regulating well drilling until 2014 with a relatively weak law that "does not go as far as other Western states by granting state agencies the power to authorize or prohibit groundwater withdrawals": https://www.kqed.org/science/21706/what-to-know-about-californias-new-groundwater-law https://www.kqed.org/science/21706/what-to-know-about-califo... I predict that we'll keep seeing well failures in California and that government's actions will not be enough to reliably provide safe tap water to all of California's communities.