Met Éireann has upgraded previous weather warnings to include a status orange alert overnight and on Tuesday.
The forecaster has warned of strong winds and heavy rain over the coming hours.
A status orange rainfall warning for Cork, Kerry, Tipperary and Waterford will come into effect from 7pm this evening, until 9pm on Tuesday.
Very heavy rain throughout the night and Tuesday will likely cause river and surface water flooding, with between 50 and 80 millimetres of rain expected to fall.
From 9pm this evening, a 24-hour status yellow rainfall warning will also come into effect for all of Leinster, Connacht and the counties of Cavan, Monaghan, Clare and Limerick.
This will likely see some river and localised surface flooding, with between 30 and 50 millimetres of rainfall expected.
Wet & windy weather on the way tonight and tomorrow ☔️🌬️
— Met Éireann (@MetEireann) February 22, 2021
Meanwhile, a status yellow wind warning for 14 counties will come into effect on Monday night.
The warning for Munster, Carlow, Kilkenny, Wexford, Sligo, Mayo, Galway and Donegal will be in place from 9pm until 6am on Tuesday morning.
Met Éireann has said winds could reach gusts of up to 110 kilometres per hour, with a risk of coastal flooding in parts.
The Road Safety Authority (RSA) is urging road users to exercise caution amid the status orange and yellow warnings.
📍 Connacht, Leinster, Clare, Limerick, Monaghan, Cavan
🌨Heavy rain on Monday night and Tuesday will lead to some river flooding and localised surface flooding. Rainfall totals of 30-50mm, higher in mountainous regions.
📆 Monday- Tuesday 23 Feb
⏰ 9pm – 9pm pic.twitter.com/kobF41Bode
— RSA Ireland (@RSAIreland) February 22, 2021
Road users in areas affected by the orange alert for heavy rain are advised to check local traffic and weather conditions before setting out on a journey.
Motorists are urged to slow down and leave a bigger space between themselves and the vehicle in front in wet weather conditions, especially on high-speed roads such as dual carriageways and motorways.
Motorists are also urged to not attempt to drive through flooded sections of road, which could be deeper than it appears and contain submerged trees or branches.