A pair of California wildfires have quickly spread, threatening hundreds of homes and forcing evacuations at a popular lakeside campground and a summer camp where flames temporarily trapped children and counselors, a fire official said.

The fire that started early Saturday afternoon in Santa Barbara County had spread to both sides of Highway 154 and was “completely out of control,” county fire Capt. Dave Zaniboni said. About 90 children and 50 counselors were struck at the Circle V Ranch and had to take shelter there until they could be safely evacuated.

In other parts of the West, evacuation orders were lifted in Colorado and Montana towns threatened by wildfires, while air and ground crews battled a growing grass fire in northwestern Colorado.