Met Éireann has issued a status yellow rainfall warning for the west of Ireland, bringing expected localised flooding and poor driving conditions.
Heavy rain is forecast until 1pm today in Mayo Donegal and Galway.
The warning will come into effect at 3pm today until midday on Wednesday.
Heavy rain throughout the evening, night and tomorrow morning is expected to give accumulations of 20 to 40mm, with potentially higher amounts in mountainous areas.
It is forecast that as soils are saturated from recent rainfall, this additional rainfall will lead to spot flooding.