A good part of the issue is tied to and or exposed by the "renewable energy" craze. I had extensive dealing with PG&E, S.Edison, SDE,...pretty much the entire "Western Grid" on transmission side tie-ins in 2008/9/10...Barry's fraud riddled "incentive years". Cali was the worse by far because of years of liberal fraud and neglect. That said, the grid in it's entirety was never designed to handle "non-traditional" input that spikes when the wind blows and or when the sun shines, as opposed to controlled current supplied based on demand. Much of the system is old and it doesn't last forever. Today it's like a patchwork that reminds me of a pic I saw of a phone line in India.