I retired from the power generation industry. I can tell you this. IF 10% of the cars on the road now was electric. Our grid could not handle it right now. California would be in even bigger trouble. Their grid is already on shaky ground. They don't have enough generation capacity for the extra load. As they have to buy electric from out of state now. Combine that with the blackouts from the fires.
The power companies have been trying to up grade the grid for years with new power lines. But people not want the power lines close to them. So the power lines are being built.