Technicians from several Europe countries are working to restore power to homes and businesses in Co Roscommon.
Thousands of people remain without electricity, almost 10 days after Storm Eowyn.
The ESB said: "Skilled technicians from counterparts in Austria, Finland, France, Great Britain, Germany, Netherlands and Norway are on the ground in the worst impacted areas, including Co Roscommon.
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"They are supporting over 2,500 local ESB Networks crews and partner contractors who have been bolstered by colleagues from the south and east of the country, as well as skilled retirees."
