I bet there is a huge run on generators. If I lived in PG&E’s footprint, I would have bought a whole house generator or battery for my solar system months ago.
We live in an outlying area where we lose power frequently from trees knocking lines down. We have been using a generator for many years for these occasions. Even an entire bank of golf cart batteries doesn't store the amount of energy contained in a few gallons of gas.
And if you are using a gasoline powered generator even the most efficient models go through a lot of fuel. We generally went through 10 gallons a day, and sometimes more. Fortunately, we have natural gas and were able to convert our generator to use that. This cut our fuel expenses to 1/3rd of what they were. Which still means that our electricity costs around 3 times what it normally does.
If you live out in the stocks where there is no natural gas, your best option would likely be to get a big propane tank and run your generator on that. It would cost multiple times what natural gas costs, but around here a lot of times the nearby gas stations lose their power also and can't fill up your containers, which can mean a long drive.