Ross Morehead is afraid his 26-year-old son Michael is running low on food and other necessities after he and a group of friends became stranded on Awera Island, off the coast of Sumatra, following last week’s earthquake.

The four Australian men had been lodging at a small resort when the 7.6 magnitude earthquake hit Padang, the capital of West Sumatran, on Wednesday, killing more than 529 people.

As of now, the island of Awera remains cut off from the mainland. This means food, medication and other supplies are likely to be running low.

Mr Morehead said their only option is a private fishing boat off the island, but food and water supplies are getting dangerously low.

He added that his wife, the mother of Michael, and himself are now getting quite worried about how to get their son back home.

Mr Morehead has lost contact with Michael last week after the earthquake, but later got news through a friend that the his son and his surfing friends were okay.

Their son does not have access to a phone on the island, but managed to contact his father on Saturday via an email.

Mr Morehead said to have been extremely relieved once he got email.

Australia’s Department of Foreign Affairs and Trade has suggested the group of surfers contact the local authorities.

Mr Morehead said that his son and his friends had flown with Tiger Airways but the airline claimed not to be able to fly in yet. Qantas is suffering from the same situation and so are other commercial flights.

Mr Morehead said Michael’s Indonesian surfing adventure had been in the works since March. The four surfing mates had scheduled to travel around the region on their own, in search of the perfect wave.