VENTURA, Calif. (Reuters) – A raging California wildfire powered by fierce winds grew into the third-largest in state history on Saturday as forced evacuations turned neighborhoods into ghost towns and ash fell in some areas like heavy snow.

High winds and dry conditions were expected to remain through the weekend to power the so-called Thomas Fire in Southern California. It has destroyed more than 1,000 structures and threatened 18,000 more since erupting on Dec. 4, including homes in the wealthy enclave of Montecito just outside the coastal city of Santa Barbara.

“It is a beast,” Santa Barbara County Fire Department Division Chief Martin Johnson told a news conference.

“But we will kill it,” he said.