Clouds of smoke filled the sky, after a brush fire burned along a hillside in Maui for more than 5 hours, on Sunday.

Gusty winds and steep terrain helped the fire to quickly spread before it was brought "under control."

Approximately 8 to 10 acres of brush burned on Mokuhau Road in Happy Valley.

The fire started around 2 p.m., after witnesses say they heard "a large boom."

Maui fire investigators believe the bushfire may have been sparked by electrical power equipment that feeds a water department substation.

The fire came close to many homes in the area.

"I walked outside.. I looked and, yeah, there was definitely some big clouds coming up.. And this is not the first time that this mountain has burned, so I wasn't too panicky. I was prepared to water down the roof if anything," Happy Valley resident, Mikey Kanada told KITV.

Not only did smoke fill the air, but while the blaze burned thousands of Maui residents were asked to conserve water.

Ground and air crews managed to get the blaze under control by 7:30 Sunday evening and fire personnel will monitor the area to make sure no hotspots flare up throughout the night.