On a planet with a surface ~3/4 covered in water, I've always just assumed since I was young that hotter weather would just mean more intense water cycles. Anywhere not landlocked on the wrong side of a watershed could stand to benefit from the extra humidity. Hopefully California can actually make use of this. There was recent rainfall the past couple years, but they have a long way to come in terms of infrastructure and also dealing with their eco laws at arms with building more reservoirs and other means of avoiding the fluctuating seasons of dry and wet.
It reminded me constantly of John Steinbeck on the drought cycle in the Salinas Valley, “During the dry years, the people forgot about the rich years, and when the wet years returned, they lost all memory of the dry years. It was always that way.”
For anyone who hasn't, I highly recommend checking out the drone footage of the Oroville dam. The scale of destruction was massive, and rumor has it even sparked a tiny gold rush after so much bedrock and sediment was churned up.