Firefighters were called to the building at 1:41 p.m. and arrived five minutes later to find flames coming from a second floor apartment.
Assistant Fire Chief Ron Brlas said the fire originated in an apartment rented by Richard Stanton, and fire investigators believe that a hot water tank was to blame.
Brlas said Stanton told firefighters he was sleeping when he smelled smoke. Stanton safely escaped the building, and the fire was extinguished by 1:58 p.m.
Yomayraliz Alvarez, who lives on the third floor of the building, said she saw the smoke and escaped by jumping off the third story balcony. She had a cut on her leg from the jump.
A pregnant woman, who was a resident in the building, was taken to the hospital for smoke inhalation.
Brlas said Stanton will be unable to live in his apartment, and other residents will likely be displaced for some time.