Damage to the sea wall at Mostyn on the North Wales coast is affecting trains between Rhyl and Chester, Arriva Trains Wales advises.
The company posted this picture on Twitter of the debris resulting from yesterday's storm.
Buses will replace trains between Rhyl and Chester until further notice.
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Early cloud and rain will spread westwards across all parts. However, it will become drier with brighter spells developing.
Any showers will ease through the evening to leave a mainly dry night with clear spells and light winds.