Home > Lifestyle > Man > Your life Updated 25 February 2014 Lost surfer: 6 greatest dangers When Cape Town surfer Brett Archibald spent 28 hours in the waters off Indonesia before being rescued, he faced these six major dangers. Susan Erasmus is a freelance writer for Health24. 1 Follow us Facebook » Ask CyberShrink » Receive Health tips » Test Your sex toy IQ » All the tests you'll ever need 8 strange things your body does When Cape Town surfer Brett Archibald spent 28 hours lost at sea, he faced several major health threats, many of which could have killed him.The most obvious would have been drowning. Even good swimmers can only keep going for so long, and in rough seas anyone can drown. If someone is unconscious when hitting the water, chances of drowning are extremely high.After a short while, hypothermia becomes a problem. It is not possible for someone in the water to maintain their body temperature for any length of time – especially if they are not wearing a wetsuit. In very cold seawater (between 0.3 and 4.4 degrees Celsius) hypothermia can set in within minutes 30 minutes and expected time of survival is between 30 and 90 minutes. Indonesia's oceans are warmer, so Archibald could keep going. In relatively warm water (up to 21 degrees Celsius) survival time is anything from 2 – 40 hours.Then, of course there is always the possibility of a shark attack. Indonesia's waters teem with both sharks and rays, and in a recent survey, 20 new species have been discovered in this area. Although humans are not at the top of sharks' list of preferences, sharks will investigate anything out of the ordinary – such as a human splashing on the surface of the water.Dehydration is a major problem to people caught in ocean water. Obviously salt water is not for drinking as its concentration of salts is up to 220 times that of fresh water. Drinking of sea water will hasten the process of dehydration considerably.Sunburn can be deadly, but usually it takes a day or two for this to become a real problem to someone in a situation such as this. Excessive sunburn can lead to further dehydration.Starvation is a real threat(Sources: seagrant.umn.edu; expeditionfleetblog, Health24;www.utah.edu) Susan Erasmus NEXT ON HEALTH24X Giving up one food will help your health – and the planet 2020-01-15 14:39 More: ManYour life advertisement Read Health24’s Comments Policy Comment on this story 1 comment Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Live healthier Lifestyle » E-cigarettes: Here are five things to know E-cigarettes have become hugely popular in the past decade, but a rash of vaping-linked deaths and illnesses in the US is feeding caution about a product that's already banned in some places. Allergy » Ditch the itch: Researchers find new drug to fight hives A new drug works by targeting an immune system antibody called immunoglobulin E, which is responsible for the allergic reaction that causes hives.