Three people have died as Storm Ophelia batters Northern Ireland and the Republic.
A woman in her 50s was killed after a tree fell on her car in Co Waterford, while a man in his 30s lost his life in what Irish police have described as a “chainsaw accident” in Co Tipperary, while trying to remove a downed tree in Cahir.
Gardai have now confirmed a third death - of a man whose car was struck by a tree at Ravensdale in Dundalk, Co Louth.
Meanwhile NIE said the occupants of a car had a "lucky escape" in Dunmurry.
A Met Office amber warning for strong winds remains in place until midnight.
The storm has caused widespread traffic and travel disruption on Monday, with roads closed and all schools off for the day, while hundreds of thousands of homes in the south and around 18,000 in NI have been left without power.
NIE said the number is expected to rise.
A spokesperson said: "Customers who are able to report the location of damage to the electricity network should call on 03457 643 643."
- VIDEO: Strong winds batter the coastline of Co Down
The coast of Co Down coast has taken a battering, with winds of up to 80mph expected during the storm's peak between 4pm and 6pm.
Meanwhile city and town centres were left deserted as the worst of the conditions swept in after midday, with staff sent home early.
The Executive Office has closed all government buildings providing non-essential services.
People are being urged to take care if travelling and pay attention to the risk posed by fallen trees and debris.
- VIDEO: Derry city centre has become like a ghost town
Translink has suspended all Metro, Goldline and NI Railway services from 5.30pm. More information is available from their website.
Several flights have been cancelled at airports in Belfast, Derry and Dublin.
Police said they intend to close the main A2 road from Harbour Roundabout in Larne to Mill Street, Cushendall, from 7pm.
The Peace Bridge in Londonderry has also been closed for the day, as has the famous Dark Hedges road in Co Antrim.
- VIDEO: Businesses are forced to close in Newcastle, Co Down
Prime Minister Theresa May and Taoiseach Leo Varadkar have spoken on the phone about the impact of Storm Ophelia.
A No 10 spokesperson said: "The Prime Minister expressed her sympathies for the loss of life and said the UK Government stood ready to provide any support if requested."
Earlier, Mr Varadkar warned: "The advice is: stay indoors until the storm passes.
"Whether that is at work, in their home or some other home, stay indoors. Check on neighbours and relatives.
"Bear in mind it is coming your way and it is a national red alert."