Status Yellow rainfall warnings are in place for eight counties in the south and east, with Met Éireann warning further heavy rain will lead to river flooding and difficult travel conditions.
A fresh warning came into effect for counties Dublin, Louth and Wicklow at 6am, and will remain in place until 9pm.
It follows a warning for counties Carlow, Kilkenny, Wexford, Cork and Waterford in place since 9pm last night, which remains in place until 3pm.
The forecaster has said further heavy rain falling on ground already saturated from a week of rain following Storm Chandra will lead to localised flooding.
The National Emergency Coordination Group (NECG) has warned the risk of flooding across the east and southeast regions is “very high” in the coming days as further heavy rain is forecast.
NECG chairperson Keith Leonard said peak levels of rainfall would be seen today, adding that emergency services and local authorities are on alert.
Cork County Council yesterday echoed advice from Met Éireann, warning there is “a higher risk of runoff and localised flooding” due to recent heavy rainfall and waterlogged soils.
The council said its severe weather assessment team “is monitoring conditions closely”, adding that crews are on standby.
Fingal County Council said sandbags have been placed along the Liffey from the Strawberry Beds to Laraghcon to help reduce any potential impacts in the area.
It said it is also “keeping a close eye on river levels and coastal conditions”.
South Dublin County Council said “all available crews are on call to respond to any issues with trucks preloaded with sandbags, for distribution if needed”.
It comes as Taoiseach Micheál Martin said the National Emergency Coordination Group and senior Government ministers will meet to review warning systems for weather events.
“That’s something we will be examining,” he said.
“There will be an overview of our systems and the framework that we have at the moment that deals with major events of this kind,” he added.