The surging wildfires raging across Northern California represent a “new normal” and the state must be prepared to spend billions of dollars dousing, containing and trying to curb them in the future, Gov. Jerry Brown said. Brown, speaking at a news conference Wednesday, said the state’s exploding population combined with climate change has conspired to create ripe conditions for the prodigious blazes. “Nature is very powerful and we are not on the side of nature,” Brown said. “Every year is teaching the fire authorities new lessons. We are in uncharted territory.”