Met Éireann says further "torrential downpours" and localised flooding are expected in the east of the country this evening.
It comes after heavy rain showers hit parts of the country earlier this afternoon.
A sudden downpour in Dublin shortly after 1pm led to some spot flooding and disruption in the capital.
The National Gallery closed for the afternoon after flooding in two staff areas.
Visitor notice: Today’s sudden rainfall resulted in flooding in two of the Gallery’s back-of-house staff areas. As a precautionary measure, the Gallery has closed this afternoon. It will reopen tomorrow.
— National Gallery of Ireland (@NGIreland) July 30, 2019
A video of a water-logged Nutgrove Avenue in Churchtown was posted online by Dublin Fire Brigade, while there was also a manhole overflowing on Clanbrassil Street.
Spot flooding was also reported at Terenure, Grafton Street, Rathmines, the IFSC and College Green.
Spot flooding on Nutgrove Ave in Churchtown after heavy rain showers. Road passable with care #Dublin #Fliuch pic.twitter.com/tdusQaub57
— Dublin Fire Brigade (@DubFireBrigade) July 30, 2019
Forecasters say there could be more rain this evening - although it is expected to be generally dry later in the night.
Met Éireann said: "Further heavy showers and thunderstorms in the east this evening with some torrential downpours and localised surface flooding.
"The showers will ease later as drier and clearer weather continues to extend from the west."
Drivers in the Dublin area are being advised to be careful when out on the wet roads this evening.
AA Roadwatch says the very wet road conditions are likely adding to delays in parts of the capital during the evening rush hour.
Irish Rail, meanwhile, warned of delays to Maynooth line services due to signalling issues caused by lightning in the area.
Update: Maynooth, M3 Parkway, Longford and Sligo services currently suspended due to weather related signalling issue. Dublin Bus accepted tickets. Further update on services will follow https://t.co/OWeF1MZq7N
— Iarnród Éireann (@IrishRail) July 30, 2019
