Flames engulfed an apartment building on Washington and Carondelet streets on Monday night.
Firefighters were called to the three-alarm fire about 8:30 p.m. It was under control at about 11 p.m.
All 26 residents in the two-story building were safely evacuated, the Fire Department reported. A dog belonging to one of the residents died in the fire, however.
About 300 people in the area were without power Monday night because of the blaze.