THE country's east coast is in for a drenching again after a night of heavy rain that caused localised flooding in the capital.
A narrow band is continuing to stretch up the east coast, and the downpours were due to continue for the rest of today and tonight.
More than 40mm of rain fell at Dublin Airport in the 24 hours up to 7am, which Met Eireann says is heavy in such a short period at this time of year.
And the resulting flooding, made worse by falling autumn leaves blocking drains, caused some traffic disruption in certain areas of Dublin early today.
Traffic was forced to slow down at Christchurch where a pool of water had formed in a dip in the road, and there was other disruption in areas like Ballyboden on the southside.
"The east coast got it worst last night," said Met Eireann spokesman Jim O'Brien. "And it is due to continue this afternoon and this evening, and through tonight.
"There will continue to be some very heavy pulses of rain in what has been an unusual week of high temperatures and high rainfall."
Unusually, some areas are getting a lot of downpours,while others are escaping quite lightly.Levels of 48mm in the 24 hours up to 7am were recorded in Kilkenny, but in Rosslare the rainfall levels in the same period were just 5mm.
Wednesday saw the highest temperatures for a September day since records began in 1881, with the mercury hitting 25C in Phoenix Park. It was the joint hottest day of the year, along with June 3.
Despite the rain, temperatures will continue to be very mild today and into early next week, with 14-18C expected as the southerly wind blows warm air over the country.
Earlier today, Dublin City Council reported that Carnlough Road, Ballygall Crescent East, Fairview Strand, Christchurch, Patrick Street, Northumberland Road, Morehampton Road, Pembroke Road and Patrick Street were all affected by spot flooding, and that work was ongoing to improve drainage.
A spokeswoman for AA roadwatch said there were quite a few patches of flooding on roads around Dublin but councils were out trying to clear them.