Weather: Flooding in Sligo, Donegal and Cork - power outages in Dublin, Donegal, Galway, Clare and Wexford
Pockets of flooding have been reported across Ireland after heavy rain drenched the island.
The north west appeared to be worst hit, with some roads impassable in counties Tyrone, Derry, Sligo and Donegal.
The Tyrone town of Omagh and its surroundings experienced particular difficulties with high water levels.
There were also reports of flooding as far south as Cork.
Stormy conditions knocked out power supply in the Carrickmines area of Dublin on Saturday night, with customers also cut off in counties Wexford, Donegal, Galway and Clare.
Met Eireann forecast persistent rain in the west throughout Sunday afternoon, spreading eastwards to all areas later.
In Northern Ireland, a Met Office yellow rain warning was in place throughout the weekend through to 6pm on Sunday.
"Please be aware that this will lead to difficult driving conditions and could cause localised flooding, particularly in the west," said the forecaster.
Gardai and the PSNI urged road users across the island to exercise extra caution due to surface water.
Fire and rescue crews in Co Donegal are working into a second night after 48 hours of non-stop rain brought the worst floods seen in the county in years.
Up to 80mm of rain fell as the West and North West suffered the worst of the weekend weather.
The village of Castlefinn in the east of the county was worst affected as the River Finn burst its banks.
A bridge into the village was almost submerged in the water.
Cars were also submerged in several towns including Ballyshannon, Bundoran, Donegal Town and Letterkenny.
At Jackson's Hotel in Ballybofey guests woke this morning to find their cars under water.
The Donegal Fire Service said crews were continuing to help home owners in several areas.
Five families in Donegal Town had to be taken to safety by boat when flood waters poured into their homes.
It is continuing to rain in Donegal after dark this evening.
Many roads are impassable, with Castlefinn cut off from main routes.
In Co Mayo the River Deel has burst its banks, sending flood waters into homes and businesses in the centre of Crossmolina where a mopping up operation has been underway since dawn.
Met Eireann says the worst of the rain will end later this evening.