The Camp Fire, the deadliest wildfire in California’s recorded history, is now 100 percent contained, the state fire agency announced on Sunday.

Seventeen days after the fire started, firefighters successfully formed a perimeter around the destructive blaze, Cal Fire officials said. Full containment does not mean that a fire is entirely extinguished, but that firefighters have established a line around it. The authorities have not yet identified the cause of the fire.

The Camp Fire burned over 150,000 acres — the equivalent of 10 Manhattan islands — and destroyed more than 18,000 structures, according to the authorities.

The fire has claimed at least 85 lives in Butte County, north of Sacramento, where the Camp Fire burned furiously.