An automatic fire sprinkler doused a fire at the Keola Lai Condominiums shortly after midnight and one resident sustained a lower leg injury from the incident, Honolulu firefighters said.

Thirty-nine firefighters responded at 12:03 a.m. to the two-alarm building fire at 600 Queen St., said Honolulu Fire Department Capt. Scot Seguirant in a statement.

The first unit of firefighters arrived at 12:06 a.m. to discover black smoke emanating from the outside window of an apartment in the 43-story building. Firefighters evacuated the building and located the fire in unit 611. A female resident escaped safely without injuries after smelling the odor of smoke and hearing the sound of the smoke alarm.

The automatic fire sprinklers extinguished the fire at 12:21 a.m.

The cause of the fire and estimated cost of damage has yet to be determined.

“The HFD would like to encourage the public to practice their fire evacuation plans,” Seguirant said. “This allows for quicker recognition and familiarization to what your fire alarm actually sounds like. Be aware. Fire can happen anywhere.”