HONOLULU (KHON2) — Ash rained down on some areas of Mililani Monday morning as a wildland fire burned in Mililani Mauka.

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The Honolulu Fire Department responded after a call came in at 5:51 a.m.

The area is burning in a remote area, which is making it challenging to fight.

Units from HFD and U.S. Army are fighting the fire with air assets.

Schools in Mililani and Wahiawa are monitoring for smoke and ash. Students are being kept indoors as a safety precaution, according to DOE.

The fire is approximately 60 acres in size and had been expanding in an easterly direction, away from the nearest residential neighborhood.

There are no threats to structures at this time and there are no evacuations in place.

HFD said in a 3:45 p.m. update that the fire is about 40% contained.