There have always been wildfires in California, but part of the reason it is different now is the changing climate and I know that’s something a lot of people don’t want to address, but it’s a reality. Take the Camp Fire for example. Paradise normally receives 5 inches of rain between May and October, but in 2018 it received just 1/7th of an inch during that same period. The rains that followed were above average, but it’s happening now that the rainy season is shorter; it starts later and it ends earlier, so the state is more dried out in the fall than it normally would be. Additionally, hotter temperatures state-wide help contribute to the drying and the exacerbation of fires when they do happen. One climate model suggests more extremes in rainfall: drought years followed by flood years, which will only worsen the fire problem as the vegetation will dry during the drought years and grow inordinately during the flood years, providing more fuel for fires.
Given that reality, we do need to take more steps toward thinning the forests, maintaining the power infrastructure, and yes, potentially not building homes in areas that are prone to fire (as I mentioned in the other thread, the Tubbs Fire burned an area that had previously burned 50 years ago in nearly the exact same pattern). You are seeing fires in states like Oregon, Arizona, and Idaho too, the difference is those states are less populated, so there is a smaller chance of power-lines starting fires since there are simply fewer of them and when fires do happen in those states, they tend to happen in remote areas where no one lives.