A BURST water main is affecting drinking water supplies to parts of Penarth and Dinas Powys.
Welsh Water says it has a team on site working to restore the supply of drinking water in the area of Redlands Road, Penarth.
It is hoping the supply will be back on later today.
A spokesman said: "A burst water main has affected drinking water supplies this morning for customers in Penarth and Dinas Powys areas.
"We have a team on site repairing the damaged main and we anticipate the water supply should begin returning to normal by later this afternoon.
"When the water supply is restored some customers may notice some discolouration of their tap water, this is normal in this situation and the water should clear when run from a cold tap.
"We apologise to customers for any inconvenience."
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