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Heavy rain and thunderstorms could cause sudden flooding and power cuts on Sunday, the Met Office has said.

The forecaster has issued a covering Wales between noon and midnight.

Eastern parts of Wales have been told to expect the worst of the weather, although the warning also covers most of England.

Some areas could see 30mm in an hour, with up to 80 mm within three to six hours elsewhere, said the Met Office.

It warned there was a small chance homes and businesses could be flooded quickly and buildings could be damaged from floodwater, lightning strikes, hail or strong winds.

There could also be delays or cancellations to trains and buses where flooding or lightning strikes happen and there was a slight chance some communities may be cut off by flooded roads, it said.