After again shutting power to hundreds of thousands this week, California’s utility PG&E disclosed Thursday that it had discovered a broken jumper cable by the ignition site of a wildfire blazing across Sonoma County. The company has warned of more blackouts this weekend and perhaps for the next decade as it refurbishes its aging grid.

Gov. Gavin Newsom is trying to deflect political blame. “It’s about dog-eat-dog capitalism meeting climate change. It’s about corporate greed meeting climate change. It’s about decades of...