Storm force winds associated with Storm Betty caused damage to the electricity network overnight affecting just over 70,000 homes, farms and businesses at the peak.
As at 11.30am, just under 50,000 electricity customers remain without power with the damage mainly attributable to lightning and fallen trees on overhead lines as a result of the high winds.
Areas most impacted include counties in the South-East along with North Dublin, Dundalk, Portlaoise and Kilkenny, Cavan and Monaghan.
All available resources are being deployed to respond to all electricity outages where safe to do so. ESB Networks crews have been working since first light and will work through this afternoon into this evening to restore power to as many customers as possible. A significant number of impacted customers will have their power restored by this evening. However, due to the scale of the damage to the electricity network, some customers in localised areas may remain without supply overnight.
Customers without power can check for real-time updates on when their fault is expected to be repaired at www.PowerCheck.ie