Met Éireann has issued two separate Status Yellow - Rainfall warnings for fourteen counties.
An alert is in place in Leinster from 6 pm this evening (Saturday, June 23rd) until 6 am on Monday (June 24th).
"Scattered thundery downpours will push northwards later Sunday and for a time on Monday. Rainfall totals of 25-40mm are possible in some areas over a short period," warned Met Éireann.
Cork and Waterford
Meanwhile, outbreaks of heavy rain in Cork and Waterford during Sunday will lead to rainfall accumulations of 25 to 40mm, with highest values in coastal areas, according to the Irish National Meteorological Service.
The warning will come into effect at 6 am on Sunday and will remain in place until 6 pm.