Thousands of acres damaged as California's Ranch Fire spreads The raging Mendocino Complex fire comprising twin blazes in the state's north has now ravaged almost 300,000 acres (120,000 hectares) -- approximately the size of sprawling Los Angeles -- in less than two weeks, becoming California's largest wildfire since record-keeping began a century ago. Images show damage from one of the twin blazes, the Ranch Fire, which has grown to 243,772 acres and is just 20 percent contained.