On Tuesday night, firefighters on the Williams Fire were able to fully contain the blaze, while thousands of firefighters continue to make progress on the remaining six major wildfires burning in Northern California, said Cal Fire spokesman Daniel Berlant. This latest rash of wildfires follows what has been an extremely busy fire season. Already this year, Cal Fire has responded to approximately 4,800 wildfires, which is nearly 1,500 more fires than last year, Berlant said. A red-flag warning was issued by the National Weather Service for parts of Siskiyou County for strong winds and low humidity. Over the next few …