PG&E is responsible for controlling growth on their right of ways. They didn't do this.
PG&E is responsible for their equipment maintenance. They neglected to do this.
The State of California is responsible for proper maintenance of state owned lands. The State didn't do this.
But, it was PG&E's refusal to pull maintenance that started several deadly fires, not to mention the San Bruno explosion.
Now, instead of performing needed maintenance in a timely manner the company cuts power to its ratepayers, putting more lives in jeopardy.