Emergency officials in New Jersey confirmed that firefighters have contained 60% of the state's wildfire in the Wharton State Forest on Saturday.
The Mines Spung Wildfire, first reported by a private pilot on June 13, has burned more than 5,000 acres, according to the New Jersey Forest Fire Service.
Firefighters were "making progress" in containing the blaze in Shamong Township, New Jersey, deploying fire engines, helicopters, bulldozers and ground, according to the state service. The cause of the fire, which has threatened five structures, is under investigation.
"The fire has got some serious burning going on right now and with that, we're having a hard time to control it," the state fire service's Chief Bill Donnelly told reporters during a press conference.
The smell of smoke was reported in New Jersey, Pennsylvania, and Delaware Friday evening, going into the weekend, according to CBS station KYW-TV.