A massive California wildfire that has already destroyed nearly 800 structures scorched another 56,000 acres on Sunday, making it the fifth largest blaze in recorded state history, as it ran toward picturesque coastal cities.

But as darkness fell fire officials said that, with the hot, dry Santa Ana winds not as fierce as expected, crews had been successful in building some fire lines between the flames and the towns of Montecito and Carpinteria.

"This is a menacing fire, certainly, but we have a lot of people working very diligently to bring it under control," Santa Barbara County Sheriff Bill Brown said at an evening news conference.