The search for missing Rodney Walter Lynn continues with a number of resources assisting in the search around Ravenswood.
The search party includes police officers from Mandurah, Pinjarra and Rockingham stations, 30 SES volunteers, SES and police dogs, Water Police and the Rescue 65 helicopter.
Police resources will remain in place, patrolling and searching for Mr Lynn throughout the night.
The 39-year-old man was last seen at his Ravenswood home on Saturday, October 24.
Richard Craig Scott left his home address on foot around 4.30pm on Saturday afternoon and has not made contact with friends or family since.
He is described as being 175cm tall, with red hair, green eyes, a fair complexion and of a medium build.
He was last wearing a white collared shirt, with chequered white shorts and black thongs.
Anyone who has information on his whereabouts is asked to call police on 131 444.