By CBS3 Staff

WHARTON STATE FOREST, N.J. (CBS) — The Wharton State Forest fire has been causing some air quality issues in Philadelphia, but the road closures have been lifted as the fire gets under control. The wildfire has scorched 13,500 acres.

It has not spread since Tuesday morning and is now 95% contained.

Officials say the cause of the fire was not natural but they still aren’t sure if it was an accident or arson.

An investigation into the cause is ongoing.