WARRENTON — A massive, quick-moving fire destroyed a building at the High Life Adventures zip line facility early Thursday morning.

The building included the High Life Zip N’ Sip Restaurant and a workshop.

The Warrenton Fire Department responded to the fire just after 1 a.m. and had to call in the Astoria Fire Department for backup. Crews addressed hot spots later in the day Thursday before the fire was contained.

No one was in the building at the time of the fire and no injuries have been reported. One firefighter was sent to the hospital for possible respiratory issues, unrelated to smoke inhalation, and was released.

An investigation determined the fire was accidental.

“It’s accidental of some sort and nothing to really define what the cause could have been,” Warrenton Fire Chief Brian Alsbury said. “There’s so many different variables in that shop.”

Alsbury said the building — a heavy timber, pole barn construction — is a total loss. By the time fire crews arrived on the scene, most of the building was considered fully involved and the fire moved quickly through the rest of the building.

The building was filled with wood and wooden elements. Some tables in the restaurant were made from thick slabs of wood and the building also included a wood stove among other materials and items that may have been factors in the blaze.

“The fire load was just extreme in this building,” Alsbury said.

According to Alsbury, the owners are hoping to move forward and rebuild. “It’s a big loss for the community and for that family,” he said.

Aubrey Louvar and her husband live in townhouses next door. The zip line facility is just a step from their backyard and they have a clear view of the building from their bedroom window.

Louvar was watching a TV show when she heard loud banging. She wondered if someone was trying to break in or if the neighbors were having a fight. Then there was one very loud explosion and the living room lit up orange. She looked out the window and saw the High Life building engulfed in flames. Ash and embers were everywhere.

Louvar and her husband quickly left their home and got into their car to be at a safer distance. They continued to hear explosions. They didn’t return to their home until around 3:30 or 4 a.m.

“The fear was definitely real,” Louvar said. “I didn’t know if we would have a home at the end of the night.”