A two-alarm fire displaced two dozen people from their Park Avenue homes on Thursday afternoon.

Fire at 175 Park Avenue came in at about 12:38 p.m., said deputy fire chief Andrew Ricciardi. He said the fire reached second alarm.

“There was fire throughout the structure upon arrival,” said the deputy chief. Fire spread to nearby 173 Park Avenue.

6 adults and 6 children were displaced from 175 Park Avenue and 5 adults and 7 children were displaced from 173 Park Avenue.

“They saved a dog,” said councilman Luis Velez, who represents that area. He said an emotional moment unfolded when firefighters rescued a dog and reunited it with a woman. “They did a great job.”

Velez said the flames could have spread to other nearby structures.

Cause of the fire remains under investigation, said the deputy chief.

The American Red Cross is providing emergency assistance to the five displaced families.