Police investigating the disappearance of Derek 'Dell' Wilton from the Illogan area of Redruth have said they are 'extremely concerned' for this welfare.
The 46 year old was last seen at 9.30am on Thursday 15 August.
Police and Coastguard have been concentrating their search in the North Cliffs area after his silver Volvo estate car was found there.
Police and coastguard rescue teams are heading back out to cliffs in Cornwall on Friday morning to search for a missing man.
Derek Wilton from Illogan has not been seen since Thursday morning.
His Volvo car was found at North Cliffs near Camborne and a search was launched last night.
The Falmouth Coastguard are carrying out a major search in the St Ives area of Cornwall.
Coastguard teams were called to assist the police in the search for a missing person earlier this evening.
The inshore lifeboat and rescue helicopter from Culdrose were called to the Hell's Mouth area.
Searches have now stopped due to the light, but will resume at around 7am.