Flood waters are continuing to rise in many areas around the country, following another night of heavy rainfall.
The National Emergency Co-Ordination Group says 200 homes have been evacuated and there are concerns for a further 150 properties.
The Defence Forces says 1,400 troops are on stand-by to respond to requests from local authorities.
Today more than 50 soldiers have been deployed to help transport residents in flooded areas and to also fill sandbags.
Rosanna White of the Defence Forces has the details of where troops have been working:
Jim Casey from the OPW, says they are concerned as water levels in the River Shannon continue to rise towards the peak level seen in 2009.
The ESB says the flow of water through Parteen Weir will remain at its current rate today, but has again warned the levels in Lough Derg may reach 2009 levels in the coming days.
Both Clare and Limerick County Councils say water levels on the Shannon have risen overnight, at Springfield, Clonlara and Castleconnell.
Counties Cork, Clare, Tipperary, Waterford and Kilkenny have been worst affected by the recent rainfall, with a number of national routes still impassable.
In one of the worst hit locations - Graiguenamanagh, Co Kilkenny - the village remains blocked by floods.
Conditions are set to improve this afternoon, but tomorrow will be wet again - bringing the risk of more flooding.
Inistioge in County Kilkenny. Image: RollingNews.ie
Defence Minister Simon Coveney says the number of Defence Forces personnel helping flood-hit communities will significantly increase from today.
Overnight, members of the army helped to clear flooded roads in Cork, Galway, Clare, Kilkenny and Westmeath.
Commandant Seán Ó Fátharta says people are relying on his troops. He explained they are providing people with access to their homes, as well as filling and distributing sandbags.
Sharon Lynsky of AA Roadwatch, has details on some flooded routes, and advises anybody looking for more information about affected roads to check the AA website.
Around 10,000 homes in Cork have been issued a boil water notice after the recent bad weather.
The precautionary measure has been put in place for the Whitegate Regional Water Supply in the east of the county.
The areas are affected are Midleton South East, Ballynacorra, Cloyne, Aghada, Whitegate, Ballycotton, Churchstown, Trabolgan and surrounding rural areas.
People there are advised to boil water for drinking, food preparation, brushing their teeth and making ice until further notice.
Irish Water and Cork County Council say they will continue to liaise with the HSE to bring an end to the notice as soon as possible.
Meanwhile Fianna Fáil wants a new approach to managing the River Shannon in order to prevent future flooding.
They want a statutory body with binding powers to bring together councils and the ESB to make decisions.
TD for Longford-Westmeath Robert Troy says something has to be done given the 'sheer devastation' over the last few weeks:
