There will be a big push over the weekend to increase the strategic reserves of water in Dublin city.
This will involve restrictions at night and in the mornings in a number of locations, said Lord Mayor Emer Costello.
The public are being asked to conserve water, fix leaks in their homes and notify the city council of leaks on streets or footpaths.
According to Dublin City Council, Griffith Avenue, Mobhi Road, Drumcondra and surrounding areas will still suffer "loss of pressure" for much of today.
A number of areas of the city experienced severe water restrictions between 7pm yesterday and 9am today. These included: Walkinstown, Errigal Road, Balfe Road, Crumlin Road, Clogher Road, Clonmacnoise, Poddle Park, Donore Avenue, Clanbrassi Street Lower, Clanwilliam Place, Brunswick Street Green, Church Street, Irish Town, Pembroke Road, Merrion Road, Anglesea Road, Mespil Road, Bath Avenue, and Merrion Road South.
All areas in the north-east of the city, from the M1 to Artane, had no water or poor pressure last night.
Water pressure is to be cut in the Fingal County Council area in the coming days, from 10pm until 6am to allow reservoirs to fill.
It was reported that in the high areas of Howth, the reservoirs were filling slowly. It was hoped that Howth Summit would have water by today.
Some areas of Finglas that had been affected were reporting that water is coming back.
Continuing water conservation in the coming days will be the key to allowing the reservoirs to refill and to restore the water supply across Finglas.