About 700 homes, farms and businesses remain without power more than two weeks after Storm Éowyn.
ESB Networks expects reconnection work will be substantially complete by Sunday evening, though some customers will remain without supply overnight.
It said all available crews and resources, partner contractors and international support are being mobilised to restore power to all customers as soon as possible.
Power has been restored to 767,000 customers following the storm and intensive work is continuing.
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“We are working over the weekend to restore supply to all remaining customers as soon as possible,” the company said.
“In some instances, when carrying out restoration work on main lines, customers whose power has been reconnected should be aware that power may have to be disconnected again for short periods of time to allow their neighbours to be reconnected,” the statement warned.
ESB said that it anticipated that pockets of customers mainly in parts of Roscommon, North Galway, Mayo and South Leitrim will be out overnight.
Technicians from counterparts in Austria, Finland, UK, Germany and Norway remain on the ground in the worst impacted areas.
They are supporting an estimated 2,500 local ESB Networks crews and partner contactors who have been bolstered by colleagues from the south and east of the country, as well as skilled retirees.
In addition to the crews deployed, over 1,300 support staff are involved in overseeing damage assessment, emergency call management, logistics and network operations.
The National Emergency Co-ordination Group (NECG), which met on Sunday, said efforts are continuing to restore water, telecommunications and other services following Storm Éowyn.
Emergency response hubs have been established to serve as study spaces for exam-year students experiencing connectivity issues.
“It will remain open for the coming week in areas which are still experiencing broadband connectivity issues given that mock exams are currently under way,” the group said, in a statement.
The NECG is the central Government platform for responding to national level emergencies.
Storm Éowyn broke wind records at multiple locations amid hurricane-force speeds, according to Met Éireann, while the Marine Institute has confirmed that “extraordinary” conditions saw wave of up to 20 metres in height, “almost the length of a tennis court”.
The NECG also emphasised the importance of safety as storm clean-up continues.
“If you come across fallen wires or damaged electricity networks, never, ever touch or approach these as they are live and extremely dangerous,” it said, in a statement.
“Report any damage to electricity infrastructure by calling 1800 372 999. Clean up and repair operations should be left with professional operators who have the necessary competence to undertake the work safely.”
It said only trained operators equipped with the necessary personal protective equipment should ever use chainsaws.
Several large-capacity generators have been provided by Poland and Denmark, following a request under an EU mechanism.
The generators are being deployed to support ESB Networks, Uisce Éireann and telecommunications operators to bring power, water, phone and broadband services back to homes, schools and businesses.
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