Water leak hampers University Hospital of Wales unit
The University Hospital of Wales in Cardiff is urging people not to go to the emergency unit unless they really need to because of a water leak.
The unit was evacuated for a short time on Sunday evening because of the leak, which triggered an escape of steam and set off fire alarms.
The hospital said on Monday that the unit was still operating, but it would take a few days to repair the damage.
If they can patients are asked to go to Barry Hospital's minor injuries unit.
A spokesperson for Cardiff and Vale University Health Board said: "The main area of damage is between the minor injuries and paediatric sections, so we are currently dealing with those patients in different areas of the unit.
"We would ask the public to bear with us for a few days while we get things back to normal and, as usual, to come to the emergency unit only if you have a genuine medical emergency that can't be dealt with by your GP or another healthcare professional.
"For patients with minor injuries, we would ask that, where possible, you attend Barry minor injuries unit, based at Barry Hospital, Colcot Road, Barry."
The unit in Barry is open Monday to Friday from 08:30 BST and closes to new patients at 15:30 BST.