Adverse weather conditions have hampered events throughout the country and caused flash flooding in Galway and Cork cities.
The call centre for the Westdoc out-of-hours GP service on the Tuam Road in Galway has been flooded.
Staff have been evacuated and calls from patients cannot be answered.
Those trying to contact the service are advised to go directly to their nearest Westdoc centre at Glenamaddy, Ballina, Knock, Craughwell, Tuam or Westport or to their nearest Accident and Emergency department.
Serious flooding is also reported in the area around the docks and other parts of Galway city.
Flash flooding was also reported in the North Ring Road, Curragh Road and Lough Road areas of Cork City.
The Fire Service, gardaí and Galway City Council have implemented an emergency plan.
The Fire Service says there was some structural damage to buildings but there are no reports of any injuries.
Galway City Council is also warning residents to expect some low water pressure in the city overnight following the disruption.
The high tide has subsided and flooding is easing but flash flooding is still a problem across the city.
Meanwhile, gale force winds have forced the organisers of the Round Ireland yacht race to postpone the start until tomorrow morning at the earliest.
Concert promoters have had to bring forward by one hour the Westlife concert at Pearse Stadium in Galway this evening.
Met Éireann is now forecasting further gales overnight and tomorrow morning and tomorrow's sailing from Dublin to Douglas in the Isle of Man has been cancelled.