Almost 400 thousand homes and businesses are without power this morning.
Storm Darragh has also caused travel disruption across the country.
ESB crews are currently working to restore power to almost half a million customers - with counties along the west coast worst affected.
Estimated restoration times are being uploaded to powercheck.ie - although further outages are expected as the effects of Storm Darragh continue to be felt.
It brought heavy rain and powerful gusts overnight - with Mace Head in Galway recording the strongest, at 141 kilometres per hour.
A nationwide status orange wind warning has now been downgraded to status yellow - it'll remain in place until 3 o'clock this afternoon.
Multiple flights - mainly to the UK - have been cancelled; all rail services in the North have been suspended, while some DART services and the Sligo-Connolly train line have been affected by fallen trees.
Irish Rail's warning of delays to northern line services, and the Dart line at Howth Junction.
Road-users are also advised to take extra care across the day, with reports of fallen trees and debris around the country.
The weather service has warned people to be aware of fallen trees. damage to power lines, very difficult travelling conditions, structural damage and wave overtopping.
A number of local councils have warned people about fallen trees. According to Sligo County Council there are a number of trees down on the N59 Corballa, Sligo to Ballina Road.
Kerry County Council said it had removed multiple downed trees across the country overnight.
Limerick Council said that the storm had created “very dangerous conditions on roads” across the county and Munster, and Mayo County Council said there were trees down on the N26 Swinford to Foxford Road and on the R331 near Kilmaine.
According to Met Éireann, Storm Darragh will continue to bring very windy and stormy conditions throughout the morning.
Winds are due to gradually moderate during the afternoon, but will remain strong on the east coast throughout the evening. Rain will clear over the course of the day, with scattered blustery showers following.
Highest temperatures of six to 11 degrees. Tomorrow will be calmer, with dry and sunny spells, and some showers in the west and northwest.
