NEW YORK — A major wildfire that broke out Friday afternoon in a conservation area in South Jersey expanded to 1,000 acres overnight but was about 50% contained as of late Saturday morning.

Danny’s Wildfire was first reported around 12:25 p.m. in a remote area of the Peaslee Wildlife Management Area in Vineland, in northeastern Cumberland County, according to the New Jersey Forest Fire Service.

The fast-spreading blaze initially burned 20 acres, officials said. But by 6 p.m., it had grown to 500 acres with 0% containment.

The fire service deployed engines, bulldozers and ground crews, along with a helicopter capable of dropping 300 gallons of water and an air tanker with a 600-gallon capacity.

In its late-night update, the agency said 20% of the then-800-acre wildfire had been contained.

That number grew to 1,000 acres by Saturday morning, with 50% containment, officials said.

No structures had been impacted by the fire, and no evacuations have been ordered as of Saturday, though some roads remained closed in the area.

Peaslee is the state’s second-largest wildlife management area, spanning nearly 30,000 acres in Atlantic, Cape May and Cumberland counties.

The area includes pine-oak woodlands, lowland bogs and riparian areas along the upper Tuckahoe River in Cumberland County, with the river serving as its eastern boundary.

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