Some 66,000 households around the country remain without water after Storm Ophelia.
Half of those should have their supply restored by tonight, with Waterford and Cork the worst affected counties.
Earlier, almost a quarter of water plants around the country were without supply.
Irish Water say they are working with local authorities and the ESB to restore supply.
Three people lost their lives as a result of the powerful storm yesterday, with winds reaching over 190 km/h in some areas.
The deaths occurred in separate incidents in Co Waterford, Co Tipperary and Co Louth.
Richard Chambers spoke to Newstalk Breakfast about the three people who lost their lives, explaining that three communities have lost "key, important and beloved members":
58-year-old Clare O’Neill died when the car she was driving was struck by a falling tree in Aglish, Co Waterford | Image: Killaloe Diocese/Twitter
In Tipperary, 31-year-old Michael Pyke was named as the second victim of the storm | Image: Killaloe Diocese/Twitter
33-year-old Fintan Goss was killed when his car was struck by a falling tree near Dundalk | Image: Facebook
The water issues are affecting areas all around the country, with dozens of individual outages.
You can find full details on the Irish Water website, including estimated repair times.
Around 137,000 customers are estimated to be without power, with crews deployed around the country.
ESB Networks says it has restored power to 216,000 homes and businesses in the last 24 hours, and 22,000 customers on Tuesday evening.
The utility says it is expected the majority of the customers will have their power restored in three to four days.
It says while progress is being made, serious damage remains to the network in the south and southwest.
Estimated restoration times can be found on the Powercheck app and Powercheck.ie from Wednesday morning.
— Denis Naughten (@DenisNaughten) October 17, 2017
The company has deployed 2,500 staff and 1,000 contractors have been engaged.
It says additional resources from Northern Ireland, Britain and France are also scheduled to provide support from Wednesday.
'Open for business'
The Defence Forces have deployed personnel, two helicopters and a water tanker in support of the national response to the storm.
Local and national authorities are today assessing the damage caused by the remnants of the Atlantic hurricane.
The National Emergency Coordination Group has also met to assess damage reports from across the country.
While no significant structural damage was caused by the ex-hurricane, it could take days to get a full picture.
Hurricane Ophelia in Kinsale. Photo: Eamonn Farrell/RollingNews.ie
There were a number of incidents in which emergency personnel almost lost their lives during the course of Ophelia yesterday.
Housing Minister Eoghan Murphy praised the emergency services for their efforts, saying people put their lives at risk to help others:
The Defence Forces have deployed 25 Army and Air Corps personnel, as well as two vehicles and two helicopters, to support the national response to the storm.
The Government has said that the 'country is open for business' after all counties were effectively brought to a standstill yesterday.
All schools are to re-open on Wednesday, while many universities and third-level institutions opened on Tuesday.
Fallen trees, downed power lines and other damage have led to many road closures or partial blockages, with counties Cork and Kerry among the worst affected. Full details are available on the AA's website.
— Irish Air Corps (@IrishAirCorps) October 17, 2017
Public transport is back to normal, with some disruption possible due to closed roads and other damage.
However, Luas services in Dublin will not be operating until Wednesday as a result of storm damage to the Red Cow depot.
Transdev's Dervla Brophy says there was some damage to the roof of the depot, and repair work is not expected to be completed until later this evening:
Three Irish Rail services have been cancelled, but the majority are operating with minor delays. Full details are available on the Irish Rail website.
— Iarnród Éireann (@IrishRail) October 17, 2017
Bus Éireann is operating a full schedule, with the exception of school buses which are not running due to the nationwide school closures.
Three services have also been cancelled between Dublin and Ratoath.
Dublin Bus services are operating as normal.
Eir earlier said around 30,000 customers are without service.
Storm Ophelia hits Dublin as trees fall down on a apartment block on Cylde Road Ballsbridge. Photo: Rollingnews.ie.
According to the HSE, health and social care services are expected to 'gradually' return to normal over the coming days.
In a statement on Tuesday night, the executive said: "Due to cancelled appointments over the past 24 hours and a subsequent 'catch-up' period required, people can expect some delays in their appointments and discharges from hospitals over the next few days.
"In the event of a cancellation, people will be contacted by the relevant service."
Dublin Airport is operating normally 'apart from a small number of cancelled flights', while Shannon Airport is also operating a normal schedule.
Both airports are advising passengers to check their flights' status with their airlines.
Additional reporting: Jack Quann