Several large wildfires are burning in California, where extreme heat and dry, windy conditions are fueling the flames. Two of the three largest fires in state history are burning in the northern San Francisco Bay area. Reports say more than 14,000 firefighters are battling those fires and over 20 others across California. The fire danger also is high in Southern California, where fires were burning in Los Angeles, San Bernardino and San Diego counties. The U.S. Forest Service closed all eight national forests in the area on Monday and shut down campgrounds around the state. September and October are traditionally wildfire season in California. A record 809,000 hectares have burned this year. The previous record, set two years ago, included the deadliest wildfire in state history. That fire destroyed most of the community of Paradise and killed 85 people. Officials have blamed the record-breaking fires on electricity lines along with strong winds and dry conditions.