Chris Sutton, a chartered surveyor with Jones Lang LaSalle, said the metro would provide benefits to Cardiff, but could also transform the economic fortunes of towns like Pontypridd.
"If we can improve the infrastructure to a town like Pontypridd, then we can help regenerate it."
A conference on 'Making the Metro Happen', organised by the Metro Consortium is due to take place next Monday.
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Fire crews have been responding to reports of flash flooding in Carmarthenshire. Some homes have been affected.
Medication designed for animals was taken from the building in Abertillery on Thursday night.
More than a thousand riders will be taking part in a series of events in and around the town.