The Minister for Public Expenditure and Reform has said relocation programmes and large levies on insurance policies may both have to be considered to tackle future floods.
Brendan Howlin told RTÉ's The Week in Politics that a relocation proposal for those living in flood-prone areas is being looked at by the Government.
Mr Howlin said the Government cannot spend the same amount of money protecting individual homes as it does on protecting larger areas.
He added that climate change means that no country can guarantee that all areas will not flood.
The minister was responding to a report in today's Sunday Business Post that states 70,000 homes have been identified by the Office of Public Works as being at risk of flooding but that at least 30,000 of these are not covered by the Government's €430m flood defence plan.
Speaking on the same programme, Fianna Fáil's spokesperson on public expenditure and reform Sean Fleming said everybody should be entitled to get house insurance.
Meanwhile, Mr Howlin said Labour has delivered in Government by taking low-paid workers out of the tax bracket.
He was responding to a poll of polls suggesting Fine Gael would win 53 seats; Labour 12; Fianna Fáil 28; Sinn Féin 28, and Independents/Others 37 seats in the next general election.
Mr Fleming said at every election his party has outperformed opinion polls.
He said the poll of polls was saying that Fine Gael and Labour will not be re-elected and that there is an alternative.
Mr Fleming said Fianna Fáil would be a safe alternative and that Sinn Féin always does worse on polling day than suggested in opinion polls.
He said Fianna Fáil is an alternative to a Fine Gael-led government.