Up to 50 cars and 10 houses were flooded after Storm Elsa swept through Galway last night.
The strong winds led to a number of fallen trees, spot flooding and hundreds of homes losing power.
The Christmas tree at Eyre Square market also came down.
Crews have been working since 5.00am this morning to clear up the damage.
Salthill, The Spanish Arch and The Galway Docks are badly flooded. High tide is not forecasted until 23:00 so this will get far worse for homes and businesses in the areas affected.
A full emergency response has been issued by The Chief Executive of GCC. pic.twitter.com/M36iLe82Yp
— Cllr. Eddie Hoare (@EddieHoareFG) December 18, 2019
Motorists are being advised to drive with extreme caution.
There are also reports of fallen trees in a number of counties in the west and midlands.
Galway City Council is urging the public to watch out for branches, debris and spot flooding on all roads.
Gary McMahon from Galway City Council says the storm had a significant impact.
"There are cars which were parked in the car park in the Salthill area, and we understand that between 40 and 50 cars would have been flooded to some extent or other overnight.
"Between five and 10 properties in the city centre and the Salthill area had some form of flooding".