A status yellow rainfall warning for Offaly and Westmeath will take effect at 8pm.
Homes and businesses in counties along the River Shannon are bracing themselves for possible flooding today.
Farmland along the river, including around Athlone and Carrick-on-Shannon's already under water but flood defences are working so far.
A status yellow rainfall warning for Connacht, Cavan, Monaghan, Donegal, Longford, Louth, Offaly, Westmeath, Meath, Clare and Tipperary will take effect at 8pm tonight.
Tom Cleary is a Race Horse Trainer near Athlone, which was badly affected by flooding in 2016.
He says locals are worried:
Mr. Cleary isn't happy with the flood defence steps being taken: