"More than 300 calls" were received by Mid & West Wales Fire Service between 7pm last night and 2am this morning about the flooding. The service says the worst affected areas were Kidwelly, North Gower, Narberth, Solva and Pembrokeshire.
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It will be dry for much of the night, but cloud will start to increase during the early hours of Thursday, with outbreaks of rain.
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A four-year-old boy killed in a house fire in Swansea has been named locally.