SAN FRANCISCO (AP) — Firefighters in Northern California were taking advantage of cool weather Saturday to build more containment lines on massive blazes ahead of warmer temperatures forecast over the weekend. Fire crews working on a group of fires in wine country had contained 42% of it Saturday morning, up from 35% on Friday night. The wildfires burning in the rugged hills north of San Francisco have scorched 583 square miles, destroyed more than 1,000 homes and other structures and killed five people. Nearly 2,800 firefighters are battling the blazes ignited by lightning 12 days ago.