Honolulu firefighters extinguished a fire that broke out at a Diamond Head home Wednesday night.

Firefighters responded to the three-alarm fire at a single-story home at 3671 Diamond Head Circle shortly after 8:30 p.m. Upon arrival, firefighters observed the home fully engulfed in flames, said Honolulu Fire Spokesman Capt. Scot Seguirant.

Three women, two men were alerted of the fire after they smelled smoke. All including a pet dog safely escaped the structure.

Firefighters brought the blaze under control at 9:19 p.m. and extinguished it at 11:53 p.m. They also extinguished two nearby trees that caught fire from embers blown downwind from the residential fire.

Emergency Medical Services treated a neighbor at the scene for smoke inhalation. The patient declined transport to a hospital.

The cause of the fire and a damage estimate has yet to be determined.

The American Red Cross is assisting displaced residents.