The blaze, dubbed the "Mines Spung Wildfire," is 5,500 acres in size and was 70% contained as of Sunday morning, the New Jersey Forest Fire Service said. Authorities say five structures remain threatened, and a campground was evacuated.

The 6,000-acre blaze, which began the morning of June 13 in Wharton State Forest and has been referred to as the Mines Sprung Wildfire, was 90% contained at noon June 16. Firefighters were patrolling the perimeter of the burn area, the agency said.