Sacramento – As of Wednesday, three major fires are wreaking havoc in northern California - a sure sign that fire season is in full swing. The Knight Fire in Stanislaus County is now 50 percent under control. 926 personnel are currently committed to battling the 5,078 acre blaze near Twain Harte that has been ravaging mountain canyons since it began on Sunday, July 26. CAL FIRE estimates that is has so far cost $9,755,000 to fight that fire. The cause of the Knight Fire is still under investigation. CAL FIRE Public Information Officer Debbie Santiago said in a press release that steep, rock and inaccessible terrain combined with extreme fire behavior have made combating the blaze difficult. Two fires continue to burn in Shasta and Lassen counties. Both fires are believed to have been started by lightning strikes, according to the California Department of Forestry and Fire Protection today. The Hat Creek Complex fire has burned 8,558 acres and is 15 percent contained. Hundreds of firefighters, 54 engines and four bulldozers are fighting the fire in the Hat Creek and Old Station area of Shasta County. So far the effort has cost $2.2 million. That complex of fires has been burning since Sunday. The Cassel Fire near the Burney region in Shasta County had burned 7,634 acres as of Wednesday and was about 18 percent contained. Another fire, the Backbone fire in Trinity County, is about 90 percent contained after burning more than 6,300 acres in the Trinity Alps Wilderness. Story by Alex Lane This email address is being protected from spambots. You need JavaScript enabled to view it.