Up to 13,000 homes have been left without electricity as the remnants of Hurricane Katia hit Ireland.
Householders across Cavan, Longford, Mayo, Sligo and Donegal bore the brunt of the storm, as winds gusting up to 130kph hit the north and north-west.
Trees were also brought down in Galway city and county while high tides made worse by the gales caused severe flooding along the promenade in Salthill.
The ESB revealed some 13,000 customers had lost their electricity supply by lunchtime on Monday, with the majority across Donegal and Cavan.
By evening, as customers in the north-west had their power restored, high winds cut supplies across Meath and north Dublin. "Our repair crews have been despatched and are working to restore supply to these customers," a spokeswoman said.
The Coast Guard urged people to take care, particularly around the coast and in exposed areas, while the road safety chiefs warned motorists to be extra vigilant if driving in stormy conditions.
The Road Safety Authority (RSA) said: "Vulnerable road users such as pedestrians, cyclists and motorcyclists are advised to check local weather forecasts before making journeys. If necessary, consider delaying your journey until the weather improves. If you must take to the roads, watch out for falling debris and keep in off the road when meeting traffic."
In Clare, the Cliffs of Moher visitors' centre urged people to postpone planned trips to the site while in Limerick flying debris was making driving conditions treacherous. Road travel in counties Cork, Tipperary, Donegal, Galway and Kildare was also disrupted by fallen trees and branches and flooding.
Elsewhere, the Irish Ferries Swift sailings from Dublin to Holyhead have been cancelled because of rough seas.
Met Eireann said winds speeds will range from 50 to 80kph - with gusts ranging 90 to 130kph. It has forecast that gale force winds will affect most of the country overnight, but will calm down on Tuesday.