At least 23 wildfires raged in forests and woodlands across California Sunday, taking the life of one firefighter and forcing hundreds to flee their homes. The biggest California wildfire — raging in the Lower Lake area north of San Francisco — spread overnight to cover even more drought-stricken ground, expanding more than 30 square miles in four or five hours, said California’s Forestry and Fire Protection Director Ken Pimlott. The fast-moving blaze had charred 84 square miles by Sunday, an area much bigger than San Francisco’s 49 square miles. It is only 5 percent contained.