The fire in Jackson, in the central portion of the New Jersey Pine Barrens, had grown to less than half a square mile (1.2 square kilometers) and was 40% contained as of mid-morning Thursday, said Deale Carey, incident commander for the fire service.

Firefighters in New Jersey are stretched even thinner as yet another wildfire burns in bone-dry conditions in the state

Firefighters are on alert as New Jersey was under a red flag warning, meaning conditions are ripe for more wildfires.