Nobody was injured when a mobile home on Race Road burned to the ground Sunday night.

Chief Ed Hartin with Central Whidbey Island Fire and Rescue said the doublewide was vacant and was undergoing renovations.

The owners were in Arizona.

Neighbors of the doublewide were alerted to the fire by the sound of a tire on a nearby utility trailer bursting from the heat.

“The loud explosion kind of got people’s attention,” Hartin said.

He said about 20 people reported the fire at about 9:15 p.m.

The house was fully involved in flames and had collapsed before firefighters arrived. The fire pushed into the crawlspace below, so it took persistence to extinguished the flames, according to Hartin.

The firefighters’ focus, Hartin said, was on protecting other structures and ensuring the flames didn’t spread.

Hartin said an outbuilding on a neighbor’s property was a little scorched, but was saved.

He said it took firefighters about an hour and a half to put out the fire. One crew stayed around all night as “fire watch” to monitor the scene.

Hartin and others with fire expertise spent most of Monday at the scene, trying to determine the cause. He said he was able to determine the area of the home where the conflagration started, but he’s still investigating the cause.