Quebec is 4x as large as California, has far more forested land, and is often very dry in late summer.
It also has massive snowstorms, ice storms, which bring down vegetation, and ranges from -40F up to 100F yearly, depending.
We can nitpick on specifics, but by no means is California more rural, or more forested. Quebec is also far less populous, and has a far more hostile environment.
Hydro Quebec does well, because vegetation is cleared, maintenance is performed, and corners aren't cut.
Unlike PG&E.