The incident has come as the Environment Agency and Met Office warn of a higher risk of flooding this autumn and winter, even after only brief periods of rain, because of the wet summer that Wales has experienced.
Rivers are full, the ground is saturated and ground waters very high in some areas, after the wettest April to June on record, and further rainfall in July, September and October.
The Environment Agency says there are 357,000 properties at risk of flooding from in Wales.
More top news
A warm and muggy night with showers, occasionally thundery in the south. These will gradually clear eastwards through the early hours
The world record for the largest scrum was broken in Cardiff today after 1,297 rugby players from across the globe took part.
Chris Coleman: Wales position 'something very special and close to my heart'.