Flooding was so severe in the Ahakista area that an ambulance couldn’t reach a man who had suffered a severe crushed hand injury around 6.30pm.
The coastguard helicopter from Waterford, Rescue 117, was tasked to airlift the man to Cork Airport, from where he was transferred by road to Cork University Hospital.
The village of Goleen was cut off for several hours after raging floods destroyed roads and smashed walls.
There was severe subsidence on several roads in and around the Schull and Toormore areas and severe flooding was also reported in Inchigeelagh, Ballingeary, on the N22 main Cork to Kerry road which was reduced to one lane in Ballyvourney, and on the Dunmanway to Bandon road.
In Cork City, the Monahan Road was closed due to flooding, with motorists also being advised to avoid certain estates in Carrigaline.
In Kerry, the downpours led to severe flooding for a time in Molls Gap and the Black Valley.
Last night, Met Éireann issued another orange weather alert for Cork, with warnings that heavy rain will continue through the night and into the mid morning, and with warnings of further localised spot flooding.