Almost 5,000 ESB customers are without power across the country due to stormy weather conditions.
Most of the power outages are in the Ballina and Castlebar areas of Co Mayo.
Bernadine Maloney, from ESB Networks, said crews are working to restore power but repairs may not be completed until tomorrow morning because of the high winds.
Information on the affected areas is available on the Power Check app or by phoning 1850 372999.
The Road Safety Authority is advising pedestrians to take extra care when near traffic or crossing the road and to be aware that a sudden gust of wind could blow them into the path of an oncoming vehicle.
The RSA has also urged motorists to allow extra space between their vehicles and cyclists or motorcyclists.
Motorists are also urged to be prepared for the prospect of coming across fallen trees and debris on roads, particularly overnight and tomorrow morning.
Meanwhile, AA Roadwatch says that high-sided vehicles are vulnerable on open or exposed roads.
The Department of Transport advises people to keep away from cliffs, piers and any other coastal areas.
Ferry services affected by bad weather
Some Irish Ferries services have also been disrupted as a result of the bad weather, with the Rosslare to Pembroke ferry being cancelled for this evening and tomorrow.
The company's fast ferry services from Dublin to Holyhead have also been cancelled today, however cruise ferry sailings from Dublin to Holyhead are still in operation.