Flooding is still affecting a number of parts of the country after torrential rainfall over the weekend.
Carlow town remains the worst affected area, while roads are flooded in counties Offaly, Tipperary, Kilkenny, Laois and Galway.
Parts of Carlow town were under almost 2m of flood water after the River Barrow burst its banks after heavy rainfall over the weekend.
Around 100 people spent last night in a hotel after they were forced to leave their apartment block on Centaur Street.
Others were ferried to and from work this morning by members of the Civil Defence.
Officials say the water level in the town has dropped but they remain on high alert as further significant rainfall is expected.
Minister for the Environment John Gormley, who is visiting Carlow to witness the town’s flooding crisis, has said he has given a commitment that the contract for flood defences will proceed as quickly as possible.
Mr Gormley said he will be issuing new national building guidelines in relation to flooding in the coming weeks, and said that unfortunately, in the past, planners were not as rigorous as they ought to have been in relation to building on flood plains.
He also said climate change was affecting weather pattern and we must take account of this in planning.
Mr Gormley met senior officials from Carlow Town Council, to discuss the response to the emergency and he also paid tribute to the local authorities and congratulated the Civil Defence and the fire brigades for what he said was an outstanding job.
In Co Offaly, the Fire Service and the Civil Defence are providing assistance to residents of the Whitehall Estate in Tullamore after the nearby river burst its banks.
A number of homes had been flooded, but the estate had not been evacuated.
Elsewhere in Tullamore, the organisers of Fleadh Cheoil na hÉireann, which is taking place this week, say they are coping with the bad weather.
Over the weekend, some campsites had to be moved to temporary locations and contingency plans are in place if needed.
Met Éireann's latest weather warning forecasts further heavy rain or showers today, with 20-30mm of rain possible in places and, with water tables high, there is a risk of some further localised flooding.
Meath County Council is still advising people in Athboy to boil all water they use from the mains supply.
Supply was restored to the town earlier today after it had been shut down yesterday.
That was done as a precautionary measure after a local river burst its banks, threatening to contaminate the drinking water supply.
A council spokesperson said they hoped to have water restored to the village of Moynalty later today.
However, a boil notice would also apply there when this happens, he said.
Meanwhile, Eircom says that over the weekend nearly 4,300 faults were reported and resolved.
However, heavy rainfall and flooding resulted in ongoing high levels of telephone faults across the country.
Currently there are about 6,500 reported faults with the worst affected areas include Clontarf, Blanchardstown, Phibsboro, Portmarnock, Leixlip and Clane.
Long delays for Belfast trains
Flooding at Portadown is causing delays of up to 90 minutes on the Dublin to Belfast train service.
And one of the busiest roads in Northern Ireland - the Broadway Underpass in Belfast - is closed.
At one stage the road was under 6m of water. Two extractor pumps have managed to remove a lot of the flood water this morning, but the underpass is expected to remain closed for the rest of the day.
Northern Ireland's Minister for Regional Development, Conor Murphy, has ordered an investigation into why the recently constructed underpass was flooded.
Northern Ireland's Environment Minister Sammy Wilson has announced a compensation package for those whose homes were affected by the flooding.