Power has been restored to thousands of homes that were left without power following strong winds and heavy rain across much of the country.
Less than 1,000 homes and businesses are without power - down from 6,000 earlier this morning, according to ESB Networks, with Co Carlow the worst affected.
ESB crews are working to restore power and service is expected to resume by this afternoon.
Irish Ferries cancelled its 2am sailing of the Oscar Wilde "due to adverse weather conditions on the Irish Sea".
Passengers from that ferry were accommodated on the 8.05am MV Ulysses Cruise Ferry.
AA Roadwatch has reported a number of fallen trees around the country.
Heavy rain & gales will affect the North & East at today with some spot flooding. The rain will clear by around mid-morning & the S winds will ease as brighter conditions further W extends across the country bringing scattered showers. Highs 6 to 9C with winds becoming fresh SW. pic.twitter.com/f8gBoTzpCm— Met Éireann (@MetEireann) December 18, 2018
Motorists in Co Cork have been advised to watch for surface water and debris on the roads and there are reports of a fallen tree between Quarry Cross and Four Cross Croad in Grenagh.
Around 1,400 homes and businesses in the county are without power.
In the UK, a Russian cargo ship has run aground off Cornwall.
A coastguard spokeswoman said the 180-metre bulk carrier - believed to be the Kuzma Minin - dragged her anchor and grounded on the western side of the port entrance between Swanpool and Gyllyngvase beaches at around 5.40am.
She added: "The vessel has 18 Russian crew on board. There is no cargo on board. She currently has a list of 5 degrees but there is no report of any pollution.
"Tugs are on their way to the vessel and a lifeboat is standing by at the scene. The Falmouth Coastguard Rescue Team have cordoned off an area around the ship.
"Tugs will be attached to the vessel and as the tide rises, the plan is to re-float the vessel."
A major emergency services response has been sparked after lorries overturned on a ferry docked at Cairnryan in Scotland in high winds.
Several ambulances were sent to the scene along with police and fire services after the vehicles shifted on board the ferry, causing damage.
No one is reported to have been injured in the incident which happened at around 7.30am.
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