UPDATE: Up to 25 millimetres of rain has already fallen in Cork since last night.
A status Orange warning for rain remains in place for Cork until 9pm- with up to 80 millimetres of rain expected to fall.
Motorists are being warned to avoid travelling if they can, and to expect spot flooding, excess surface water and very high winds if they do travel.
There are reports of flooding on the Bantry to Cork Road, at the bridge in Rathcoole, at Longfield's Bridge in Mallow and close to the filling station on the N71 on the Innishannon side of Bandon.
A section of the R587 is impassable outside Dunmanway and Council crews are at the scene.