25,000 service users in the region have no electricity supply.
200 additional staff from Scotland, Wales, England and France are helping ESB workers in the five counties to reconnect households.
70,000 people nationwide remain without power after the storm, with water outages affecting 25,000households.
Senan Colleran from ESB Networks says crews have been working night and day.
312,000 homes & businesses now restored.We are working to restore the remaining 74,000. Full updates on esbnetworks.ie. Apologies. #staysafe
— ESB Networks (@ESBNetworks) October 19, 2017