Police are searching an area of bushland in Langwarrin South in the hope of locating missing man Paul.
The 50-year-old Langwarrin man is believed to have left his Wattlebird Crescent home at about 9am on Thursday 30 December.
Police and family have concerns for Paul as his disapperance is out of character and he has medical conditions that require medication.
They are also concerned for his wellbeing due to the heatwave conditions forecast over the coming days.
Paul is believed to be travelling on foot and may be in the Langwarrin Flora and Fauna Reserve.
He is believed to be wearing grey tracksuit pants with a blue stripe and a t-shirt.
Police and SES crews are searching an area of bushland south of Peninsula Private Hospital following an unconfirmed sighting at about 5am this morning.
Police have released an image of Paul and urge anyone with information on his whereabouts to contact Carrum Downs Police Station on 8770 4100.