Irish Water has confirmed that there will be further water restrictions for the Greater Dublin Area from Monday night.
Water will be turned down to a trickle in some areas of Dublin, Wicklow, Meath and Kildare.
The details of the areas to be affected are due to be confirmed tomorrow.
It comes as there has been no significant rainfall for 40 days and none is forecast for at least ten more days.
Irish Water said it is examining water supply across counties Dublin, Wicklow, Meath and Kildare to see which areas will be least impacted by reducing water pressure.
Speaking on RTÉ’s 6.1 News, Kate Gannon, Corporate Affairs Manager at Irish Water said it plans to reduce water pressure between midnight and 5am from Monday night in certain areas due to the continuing shortages.
Ms Gannon said the aim is to maximise water that can be conserved, while minimising the impact on customers.
At present there are 25 zones across the country under restrictions and 100 schemes at risk of restrictions, she said.
Ms Gannon said that even if it rains heavily for two weeks supplies will still be short.
She said there has been a reduction in demand since restrictions were introduced and she thanked people for their efforts. She also said work to fix leaks is continuing, with 37 per cent of the system across greater Dublin affected.
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Earlier, the public were commended for the conservation of water by the Minister for Housing, but Eoghan Murphy has called on people to continue to use it responsibly.
Speaking in the Dáil, Mr Murphy said that as the drought is likely to persist, restrictions such as reduced water pressure at night on a much wider scale would be prudent.
"It is not just into July and August that we need to plan, but into September and even into October as well," Mr Murphy said.
He said the overriding concern is the supply of drinking water in the late summer and into Autumn.
Mr Murphy said everyone needs to support the responsible use of water and householders, famers and business owners need to conserve water at every opportunity and think about "resilience and how they will cope if supplies are reduced further".
The Minister said while there may be a small amount of rain in the days ahead, it would not change the overall picture and water supplies need to be conserved for the weeks and the months ahead.
Status Yellow drought advisory remains in place
Met Éireann said a status yellow drought advisory remains in place across the country until midday tomorrow and is likely to be extended.
The country has experienced dry conditions since 21 June and despite some very light rain in parts yesterday, drought conditions persist.
More changeable weather is forecast from the middle of next week.
Meanwhile, the Air Corps has said that it dropped the equivalent of 1,200,000 bottles of water during aerial firefighting exercises over the past fortnight.
In a statement, it said that 600,000 litres of water was dropped from bambi buckets attached to Air Corps AW139 helicopters during firefighting operations.
The Air Corps said that its crews helped battle wildfires in Cork, Limerick, Offaly, Wicklow, Dublin and Armagh.
Additional reporting Ailbhe Conneely