This article was reproduced with the kind permission
of the British Broadcasting Corporation
12 November 2007, 12:59 GMT
A police and fire investigation has started into the blaze, early on Saturday morning.
Most people living in nearby homes returned after structural engineers assessed the three-storey block.
However, four people in the most damaged building and three contract workers had to be re-housed.
Fire crews took four hours to bring the blaze under control after they were called at around 0435 GMT on Saturday.
The blaze had spread to the roof and an adjacent furniture store and two people had to be rescued.
Between 25 and 30 people were sent to the local Tesco store, which said it provided hot drinks, food and clothing for those in the evacuation organised by Dyfed-Powys Police.
A Pembrokeshire council spokesman said some people stayed with friends or family while one couple were put in council accommodation in Haverfordwest.
Most families were back at home on Saturday night after a council structural engineer said it was safe for them to return but a handful including those living in the most badly damaged building and three LNG workers had to be re-housed.
The fire is in an area known locally as Humbers Corner. It began on Laws Street and spread to neighbouring properties on Dimond Street.
Mid and West Wales Fire and Rescue Service has said both streets are expected to remain closed for some time.
Meanwhile, two fires on Sunday morning saw five people rescued by firefighters.
Two women and a man were rescued from a first-floor flat in Barmouth and a man, a woman and a dog were rescued from a flat in Wrexham.
A ground-floor classroom at Glan-y-mor Comprehensive School in Burry Port was also damaged by a blaze.