A burst water main in Ballyshannon in Co. Donegal may cause disruption to the supply in the area.
Irish Water are carrying out repair works and are expected to be completed by 4pm this afternoon.
Motorists are being advised that a traffic management system will be in place for the duration.
While works are due to be take place around Mullinbuoys and surrounding areas in Co. Donegal from 9am until 1pm on Friday.
Irish Water say to allow up to 3 hours after the repairs have finished for the supply to return to normal in both instances.