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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Two people have died after being involved in separate lightning strikes in Wales' Brecon Beacons today.
Any lingering showers will ease this evening, to leave a dry night with plenty of clear spells. Minimum temperature 11 deg C (52 deg F).
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