North Wales Fire Service says that it received 11 calls from people whose properties were vulnerable to flooding. The majority of those calls were from the Dolgellau area.
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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.