“Whether we capture and store it is an entirely different question.”
No question about it, we won’t capture or store anything beyond our aged reservoir cspacity. The rest is going to flow down to the ocean. Unless it’s snow pack, which will melt later, some of which we will likely still capture and store. But our population has doubled in 40 years and our Reservoir capacity simply hasn’t. I think Los Vaqueros in Contra Costa County is the newest in the State, and it’s a couple of decades old. So, no, we aren’t going to capture and store anywhere near as much of this storm water as we need to.
They built a two new ones in Los Angeles 5-7 years ago as I recall, but it was to replace the older one. No additional storage capacity net overall. I think the new one is underground or has a roof over it or something along those lines. My memory is fuzzy but a web search did confirm the construction - but just to replace the old one.