02-27-2021- 0210hrs. 49 Residents were left homeless when 3 alarm fire erupted in an occupied multiple dwelling at 30-32 North 7th St. The initial dispatch was for a reported fire at that location with several calls to the Fire Alarm Office. On dispatch it was reported that there was possible entrapment in the building. Units arrived quickly and a working fire was confirmed and a 2nd alarm was transmitted. The fire had extended into the "D" exposure with the adjacent building at 26-28. Conditions continued to deteriorate as fire took hold of the building of origin and DC Ricciardi who arrived on scene and assumed command ordered a 3rd alarm sturck for manpower to the scene and bringing mutual aid to the city for cover. The main fire building was totally destroyed with the roof collapse and interior floors collapsing. Fire to the "D" exposure was held to unit 28 of the adjacent building. One firefighter was injured with burns and was transported to a hospital for treatment. Injuries did not appear to be life threatening. Units were on scene all day and an emergency demolition was ordered for the building of origin due to the unsafe condition.