(Yreka, CA)  --  Firefighters continue gaining ground on California's most destructive wildfire so far this year.  Cal Fire says the Klamathon Fire at the Oregon border is now 75-percent contained as of last night and it hasn't consumed any additional acres or structures over the last few days.  The tally since it started in Siskyou County on July 5th remains at just under 37-thousand-acres burned and 94 structures damaged or destroyed.  It has also killed one civilian and injured three firefighters.