Officer in charge of the incident, Station Manager Paul Riddell, said: "On arrival crews were met with a severe and rapidly developing fire in a top floor flat where multiple rescues were required and aggressive firefighting undertaken.
"Numerous families did a fantastic job of getting to a place of fresh air after they realised they could not escape via the communal corridor. Residents had retreated to their balconies after blocking the bottom of their front doors with towels and blankets to stop smoke entering their properties."
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Teenagers across Wales, Northern Ireland and England are to get their results, with much of the focus on the effect of reforms in England.
Helen has Thursday's forecast for the west of the ITV Meridian region.
Helen has Thursday's forecast for the east of the ITV Meridian region.