Forecasters have warned of another night of heavy rain and thunderstorms after an overnight deluge unleashed flash floods across the country.
As Met Eireann issued an orange weather warning predicting more than 30mm of rain, a water-damaged Clery's department store in Dublin announced it is to remain closed in the coming days.
Parts of the roof of the landmark O'Connell Street store fell through shortly after midnight on Wednesday, prompting bosses to order an examination into the extent of the destruction.
Further heavy downpours are expected in Cavan, Monaghan, Donegal, Dublin, Longford, Louth, Westmeath and Meath - bringing rainfall amounts to more than 30mm in a six-hour period.
Thousands of homes were left with no power following Wednesday's stormy weather, but ESB crews worked through the morning to restore electricity.
Around 2,000 households in Fermoy, Co Cork, were affected and 900 homes in Arklow, Co Wicklow.
There was also damage to the roof of the Mater Hospital in Dublin, but no one was injured.
A small number of patients in the high dependency unit of the hospital were temporarily moved to other beds to allow for repairs.
Houses and businesses in Middleton in Co Cork also suffered overnight flooding. The town's main street and Ballinacurra village were worst hit.
In the capital, DART services between Bray and Greystones were cancelled because of lightning damage.