Other than a few location shots for the Hollywood expeditions and location work at the Warner Ranch, Warner Bros. Studios was the only LA location used regularly for filming, and as far as I know that area north of the Hollywood Hills (home to many studios) is free from fire. All the movie ranches were around Santa Clarita or even further away.
BTW. The Warner Ranch, home to the Bewitched house and Friends fountain was razed in 2023 to make way for offices - see here.