LOS ANGELES, California (CNN) -- A fatal wildfire burning north of Los Angeles grew to more than twice the size of California's capital Tuesday evening, as officials upped the reward for information on who set the blaze to $150,000.
The Station fire continues to spread in California, leaving charred trees in its wake.
"The fire is now roughly two and a half times the size of the city of Sacramento, although fire growth has slowed over the last week," fire authorities said.
The Los Angeles County Board of Supervisors agreed to offer $50,000 for "information leading to the arrest and conviction of the individual(s) responsible for the Station fire," according to a statement from Supervisor Michael D. Antonovich. The board's reward is in addition to the $100,000 reward announced by Gov. Arnold Schwarzenegger on Friday.
The Station fire has burned for nearly two weeks and has charred 160,357 acres -- an area a little bigger than the size of Madrid, Spain -- making it the eighth-largest wildfire in California since 1932, according to the California Department of Forestry and Fire Protection.
About 4,700 firefighters are battling the blaze and have contained about 60 percent of the fire, said U.S. Forest Service Fire Chief Mike Dietrich. Watch how residents express gratitude to firefighters »
Firefighters expect to fully contain the fire by September 15, Dietrich said, but that date depends on both the daily changes in the blaze's spread and firefighters' attempts to quell it.
Authorities said last week that the fire was caused by arson. A homicide investigation has been launched into the deaths of two firefighters who died in a vehicle crash while fleeing fast-moving flames.
Ten people have been injured in the Station fire, Gwen Shaffer of the U.S. Forest Service told CNN.
The fire has destroyed 78 homes, two businesses and 88 other buildings, said Los Angeles County Fire Department Assistant Fire Chief Ron Watson. Thirteen homes, one business and 30 other buildings suffered damage as well, he said.
The wildfire also has threatened about 10,000 homes and 500 businesses. The estimated cost of the fire is more than $57.6 million, fire officials said.