BALTIMORE (WJZ) โ€” Firefighters now say they know what caused that massive fire at the Annapolis Yacht Club last week.

Derek Valcourt explains the blaze is being blamed on a common holiday hazard.

Yet another fire caused by an electrical malfunction with an artifical pre-lit Christmas tree.

It took firefighters hours to get the flames at the Annapolis Yacht Club under control. Though no one was seriously injured, damage estimates exceed $9 million.

โ€œWe know the fire was electrical in origin,โ€ said Annapolis Fire Department Chief John Bowes.

Bowes said the cause of the fire was an electrical malfunction with an artificial pre-lit Christmas tree inside the building. Authorities warn the decorations on artificial trees can be part of the problem.

โ€œSomebody could easily put way too much combustible stuff on this tree thinking theyโ€™re safe when in fact they may not be,โ€ Bowes said.

News of what caused the fire hit home in Anne Arundel County, where many are still grieving over a Christmas tree fire last holiday season that ripped through a mansion and claimed six lives.

In January, Donald and Sandy Pile and their four grandchildren couldnโ€™t escape their 16,000 square foot home when their tree caught fire. It started in an outlet that was located underneath the tree, then spread to a Christmas tree skirt and then was fueled by the Christmas tree.

Though Christmas tree fires are rare, video of controlled burns show it only takes a matter of seconds for dried out real trees and some artificial trees to become fully engulfed. Thatโ€™s why firefighters recommend extra caution. Check to see if your tree is fire-resistant; inspect pre-lit trees for frayed or cracked electrical wiring; donโ€™t overload electrical outlets and keep the tree away from any heat source.

Firefighters say because they are such hazards, Christmas trees shouldnโ€™t be left up too long after the holiday and your real tree should come down as soon as it starts dropping needles.

Annapolis Yacht Clubโ€™s owners have vowed to rebuild the historic facility.