Tens of thousands are without water in the city and nearby areas because of a burst main.
Irish Water says teams are working on it, but it's a "complex" job because of the location of the pipe.
The affected areas include the Liberties, Kilmainham, the North Inner City and many suburbs towards Drumcondra and Clontarf.
We're working with @DubCityCouncil to restore water supply as quickly as possible to impacted customers in parts of the city centre and surrounding suburbs following a burst to a high-pressure water main. See https://t.co/Ry99jllFA8 for more.
— Uisce Éireann - Irish Water (@IrishWater) May 25, 2023
The utility company says supply will be restored as soon as possible, but that’s expected to be tomorrow morning.
Irish Water says: "Dedicated water services crews are onsite working on repairs and every effort is being made to reduce the impact on homes and businesses and restore normal water supply as quickly as possible.
"Crews are also reconfiguring the network to maintain customers’ supplies where possible. Repairs are complex due to the location of the dig and the presence of other underground services.
"While repairs are underway, customers in the following areas may be impacted by reduced water pressure and/or water outages until works are completed: Dolphins Barn, Harolds Cross, Kilmainham, Fleet Street, Brunswich Street, The Liberties, Gardener Street, Dorset Street, Drumcondra, Whitehall, Artane, Coolock, Beaumont, Fairview, Raheny, Clontarf, Killester, Home Farm and surrounding areas.
"Repairs are ongoing and expected to be completed by 10 am tomorrow. A further update will be provided as the works progress.
"Typically it takes two to three hours following restoration time for water to refill the networks and normal supply to be fully restored."
Joe O’Reilly, Uisce Éireann, says: "The repairs are being conducted as quickly and as efficiently as possible to minimise disruption to homes and businesses and restore water for all customers.
"We understand the inconvenience an unplanned outage can have and we appreciate your patience as we work to return normal water supply as quickly as possible."