(Powerhouse fire/Screenshot, CBS News)

Known as the powerhouse fire, the flames forced more than three thousand to evacuate, tore through about 25,000 acres and destroyed half a dozen homes since Thursday. Seven hundred homes are under evacuation orders and 15 other structures incurred damages. 

The fire, which has fed on old brush that hasn't burned in decades, did grow, but cooling weather conditions gave crews the opportunity to make some major gains, U.S. Forest Spokesman Matt Correlli told CBS News.

SEE ALSO: Powerhouse Fire Escalates

Another 1,000 people and 250 homes are waiting evacuation orders in the Green Valley Community if the fire moves closer, authorities said at a press briefing Sunday.

The cost of fighting the fire has already reached $2.7 million.

The cause of the fire is under investigation, though the blaze was partly fueled by "extremely old and dry" brush and debris that had not been burned since 1929, according to U.S. Forest Service Incident Commander Norm Walker.

Close to 2,200 firefighters took on the Powerhouse fire over the past few days, joining thousands of other firefighters battling wildfires burning in northern New Mexico spurred by drought, dry weather and high winds. Thankfully, firefighters say Sunday evenings increased humidity has improved wildfire conditions in that state as well.

However, knowing how unpredictable the wind had been throughout the day, L.A. fire crews remain vigilant. “As quickly as it died off, it can pick up again,” said Kern County Fire Department spokesman Sean Collins told the L.A. Times.

Read more at CBS News.

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