I agree that desalination is the only method that actually produces more water rather than redistributing existing water. California's population has doubled since the 1970s, Arizona and Nevada have also seen significant increases. All of these areas are arid climates. More water storage is certainly needed, but that also has limitations. All of our reservoirs were full in 2019, now just 2 years later, many are nearly drained. Desalination is expensive, but it has worked well in many middle Eastern countries. Coastal locations have an abundance of sun, wind and wave action that can be used to generate the much of the power needed for desalination. Southern California's significant reliance on water transported from Northern California has it's limitations as all those putting demands on it have shown.