..."renewable energy." The wind turbines in California are strewn over more than 1500 square miles of destroyed former wilderness, much of it in remote areas.
This requires a vast, destructive, and apparently dangerous network of transmission lines, the necessity of which is exacerbated by solar facilities, which are also dependent on mass, land, and transmission dependent wiring.
This is a function of the fact that so called "renewable energy" is unreliable, needs to be backed up by fossil fuel plants - to which wires must also be extended - a rather toxic and economically absurd redundancy that is seldom discussed in the dishonest marketing driving climate change, the fossil fuel/"renewable energy" nexus that has metastasized all over the planet, literally choking it.
To return to wind, according to the California Energy Commission's last available data, from 2022, the Diablo Canyon nuclear reactors produced, on a 12 acre footprint more energy (17,627 GWh) than all the wind turbines in that State, (13,938 GWh).
California Energy Commission 2022 Total System Electric Generation
If the people of California want to identify a cause of transmission line fires, I would suggest they ask the resident antinukes to look in the mirror.
The people of California could reduce the risk of transmission line fires by dismantling all of its wind turbines, restoring the wilderness trashed by them, and building another equivalent of Diablo Canyon. It takes just one trunk line to connect Diablo Canyon to the grid.