ESB networks say it will take some time to fix a fault in the Tramore area of Waterford.
Close to 1,700 customers were left without electricity following a fault with a high tension cable earlier.
Crews isolated the fault and restored power to 1,600 homes and businesses.
However, the remaining 93 customers will be without electricity until around 11.00pm tonight.
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ESB Networks have apologised for any inconvenience caused.
Updates are available here