Hundreds of firefighters continued to battle a wildfire in the Sespe Wilderness north of Ojai on Sunday with no containment in sight.

The Pine fire started Thursday morning about 11 miles north of Ojai. As of Sunday morning, the fire had consumed 1,590 acres and was threatening 50 structures, said Helen Tarbet with the Los Padres National Forest. The area’s “very remote and steep and rugged terrain” has made it difficult for the more than 350 fire personnel to get a handle on the blaze, Tarbet said. The fire could be partially contained by Sunday night.