It’s been 20 years since California ISO has had to order rolling blackouts. The extraordinary move happened on 8/14/2020 affecting millions of people because the state was not prepared for high electricity use during a heatwave.
The governor has ordered an investigation of how this happened. No such investigation is needed. Energy analysts have been predicting this moment for many years. There is a lot of blame to spread around, including the guy calling for an investigation as well as the people who voted for him and previous governors.
The really bad news is that these blackouts are going to be an ever-present reality in California for years to come.