An orange rainfall warning is in place for Waterford and Wicklow, effective from 3am Thursday morning until 3am Friday morning.
Met Éireann has warned of spells of very heavy rain on already saturated ground combined with high river levels and high tides.
This, the national broadcaster said, will lead to localised flooding, river fooding, with potential impacts along the entire course of the river.
Travel conditions in both counties are also expected to be very difficult.
A yellow rainfall warning is also in place for Carlow, Dublin, Kildare, Kilkenny, Laois, Louth, Wexford, Monaghan and Tipperary during the same 24 hours.
High river levels and high tides will lead to localised flooding and river flooding.
There has already been significant flooding in the southeast and east during and after Storm Chandra. The storm brought strong winds and heavy rain on Monday 26 and Tuesday 27 January, with more rainfall continuing up to the end of the month.
January 2026 was the wettest January since 1948, according to Met Éireann.
The majority of monthly rainfall totals were above their 1991-2020 Long-Term Average (LTA).
It was the second wettest on record at both Phoenix Park, Co Dublin with 141 mm (225% of its LTA) and Dublin Airport, Co Dublin with 137.7mm (223% of its LTA).
SHARING OPTIONS