It could take up to ten days to restore connection to the homes without power, says Northern Ireland Electricity.
A red wind warning has been issued for the whole of the Republic of Ireland, with Met Éireann warning of a possible "danger to life". The alert comes into effect at varying times from 02:00 on Friday and will end at varying times. Met Éireann has warned that "severe, damaging and destructive winds" are expected, with gusts of up to 130km/h.
Storm Éowyn has claimed two victims after wind speeds in the UK hit 100mph - the Met Office still has several weather warnings in place this evening as there continues to be a 'danger to life'
Millions of mobile phone users got an emergency alert as people in Scotland and Northern Ireland warned to stay indoors and schools close
While the country deals with the aftermath of Storm Éowyn, some parts of Ireland will continue to battle with poor weather conditions as a Snow-Ice alert has been issued
Britain is set to be battered by winds of up to 90mph from Storm Eowyn as the Met Office warned of a danger to life in parts of the country over the next few days. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
Storm Éowyn is about to hit the U.K. and Ireland as forecasters warn the explosive "bomb cyclone" will bring snow, rain and potentially deadly superfast winds.
ESB Networks in Ireland and NIE Networks say they expect significant further outages as Storm Eowyn continues to batter parts of the island.
Winds reached 100mph as Storm Eowyn left one person dead, more than a million people without power and caused significant travel disruption across the UK and Ireland. Rail services, flights and ferries have been cancelled across the country as rare red weather warnings are in place on Friday in Scotland.