Abertawe Bro Morgannwg University Health Board says it has seen a high number of emergency admissions, and its A&E departments are extremely busy and under pressure.
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More rain for Wales on the way over the next few days.
The Met Office has issued a severe weather warning for more rain across parts of Wales.
Kevin Price and Daniel Joseph Davies were caught on CCTV taking a £27,000 excavator from a building site.