A brush fire deep in the Kamilo Nui Valley in Hawaii Kai has charred roughly 20 acres and continues to burn early Thursday, the Honolulu Fire Department said.
Flames were first reported at around 5 p.m. on Wednesday evening in the Kamilo Nui Valley.
The fire is burning in an area nearly inaccessible by foot. A helicopter assisted with water drops on the flames Wednesday evening.
No homes or structures are threatened, and there are no reports of evacuation orders.
Viewer photos show the flames spreading over several mountain ridges.
Nearby residents say this fire is the largest out of a string of recent fires in the area.
"It's been going on for two months. There are small fires, but this one is the real biggest one," resident Carolyn Kawano said. "It's hard to say because I know there's like, homeless up there too. So they don't know who the culprit is."
HFD officials have established a landing zone at Kamiloiki Elementary School, and continued to monitor the situation through the night. Additional fire crews will reassess in the morning.
No injuries have been reported, and the cause of the flames are unknown.