Heat is the real killer
Forget the wildlife, heat does the damage, and it escalates in recognisable stages you should be able to recite. Stage one is dehydration and cramps: thirst, heavy sweating, muscle cramps, flagging energy. Stage two is heat exhaustion: dizziness, headache, nausea, pale clammy skin, and it means stop work, shade, water and cooling NOW, not at smoko. Stage three is heat stroke, and it is a medical emergency: confusion, staggering, slurred speech, skin that may be hot and DRY because sweating has shut down, collapse. That is a 000 call, aggressive cooling (shade, wet the skin, cool the neck, armpits and groin, fan them) and no debate, because heat stroke kills and cooks kidneys on the way. Prevention is unglamorous and works: drink 500ml to a litre of water per hour when picking in 35-40°C heat, before you feel thirsty (thirst means you are already behind), add electrolytes on big days, eat salty food, and watch your workmates for the confusion stage, because the person with heat stroke is the last one to know they have it. You can legally stop unsafe work in extreme heat, and no bin of fruit is worth an organ.
Snakes, the truth versus the myth
Australia has the world's most venomous snakes AND one of the world's lowest snakebite death rates, around two deaths a year in a country of 27 million, because antivenom, ambulances and first aid work. Snakes want nothing to do with you: they feel you coming and leave. Almost every bite happens to someone trying to kill, catch or show off with a snake, so the number one rule is simply: leave it alone and walk away. Prevention: boots and long pants in long grass, step ON logs rather than over them (snakes shelter on the far side), use a torch at night in warm months, and give any snake a couple of metres of respect. Now the first aid, because the myths from movies will kill someone: NO tourniquets, NO cutting, NO sucking, and never, EVER wash the bite, because the hospital identifies the venom from swabs of the skin and washing destroys the evidence they need to choose the antivenom. The correct response is pressure-immobilisation: wrap a firm elastic bandage over the bite site, then bandage the ENTIRE limb from the extremity upward as tight as for a sprain, splint it so it cannot bend, keep the person completely still (venom travels through the lymphatic system, which is pumped by muscle movement), mark the bite site on the bandage, and call 000. Do not walk to help; bring help to you. People who do this properly and stay still have hours, not minutes, and survive.
Spiders, a smaller deal than the memes
Nobody has died from a confirmed spider bite in Australia since funnel-web antivenom arrived in 1981, a sentence worth reading twice given what the internet told you. The two that matter: redbacks live in dry sheltered spots (wood piles, outdoor furniture, farm gloves, under toilet seats in old outhouses), so shake out boots, gloves and anything left outside overnight, especially on farms; bites are painful but slow-acting, so the response is calm, a cold pack, and medical advice, no pressure bandage needed. Funnel-webs are largely a Sydney-region and east-coast thing; their bites DO get the full pressure-immobilisation treatment like a snakebite plus hospital, fast. Everything else is theatre: huntsmen are huge, fast, harmless and will absolutely appear inside your van at highway speed one day (pull over, breathe, usher it out with a container, tell the story forever), and white-tails, daddy long-legs and the rest of the folklore are not the danger the memes claim. Statistically the most dangerous animal encounter of your year is a European wasp on a soft drink can, or a magpie in September. Respect, don't fear.
Sun, the slow-motion hazard
Australia has the world's highest skin cancer rates, the UV here is genuinely stronger than at equivalent latitudes in Europe, and backpackers pick fruit through the worst hours of it. The protocol: SPF50+ broad spectrum, reapplied every two hours because sweat kills sunscreen, long sleeves (a loose cotton or work shirt is genuinely cooler than burnt skin), a real broad-brim hat rather than a cap, and sunglasses, because eyes burn too. UV peaks between 10am and 3pm, burns straight through cloud cover, and reflects off water, sand and tin sheds. Sunburn is also a work injury in practical terms: a blistering burn on day three of a picking job can cost you the whole gig, and heat plus burn compound each other. Longer term, make a habit of glancing at your own skin: new or changing moles get checked at any GP or skin clinic, and outdoor-work sunscreen is a legitimate tax deduction, which is the most Australian sentence in this guide. Slip, slop, slap was never a joke here; the locals with leather skin and scars from removals are the ones who learned late.
Water: drinking it, purifying it, carrying it
Three water rules run remote Australia. Carrying: 10L+ per person in any vehicle heading remote, more in summer, and never rely on finding water, because the creek marked on the map is dry ten months of the year. Drinking: town tap water is excellent almost everywhere in Australia, but out bush be more careful. Bore water can be too mineralised to drink (locals will tell you), station tank water is usually rainwater and usually fine but not guaranteed, and creek, river or dam water should be treated ALWAYS, no matter how clear it looks, because livestock and wildlife share every catchment. Treatment is easy: a rolling boil for a minute, purification tablets, or a decent filter, any of them beats a week of giardia in a bush camp with a long-drop toilet. Signs at taps saying 'not for drinking' mean it. And the telling-someone layer: before remote trips share your route and check-in time (Matey live location on trips exists for this), register your walk where parks offer it, start summer hikes at dawn, and remember much of the outback has NO phone signal, which is why PLBs (personal locator beacons, hireable from many parks offices) exist and are worth every cent.
Medicare, doctors and who is covered
Australia has reciprocal health care agreements with a specific list of countries: the UK, Ireland, New Zealand, Sweden, the Netherlands, Norway, Finland, Belgium, Slovenia, Italy and Malta. Passport holders from those countries can enrol in Medicare on arrival (a Services Australia service centre, passport and visa details) and get medically necessary care subsidised: GP visits, public hospital treatment, cheaper prescriptions. Everyone else, including Germans, French, Canadians and all Americans: your travel insurance IS your health system here, so make sure it covers farm and manual work before your first shift, not after the injury. Two gaps that catch even the covered: ambulances are NOT covered by Medicare in most states and can cost from hundreds to thousands (some states sell cheap annual ambulance cover, the best-value insurance in the country), and dental is essentially all private and all expensive, so fix teeth before flying or budget properly. Practical access: GP clinics that 'bulk bill' charge Medicare directly with no gap for the patient, healthdirect (1800 022 222) is a free 24/7 nurse line for the 'is this serious?' question, and after-hours pharmacists are an underrated source of free sensible advice.
Your head out there
Now the health topic nobody puts on the poster: remote farm work can be genuinely hard on your head, and the low patches are NORMAL, not a personal failing. The recipe is well known: physical exhaustion, isolation, a tiny social world you did not choose, no family within 15,000km, patchy signal, and week four of the same paddock. Nearly everyone who does the 88 days hits a stretch of it. What helps is boring and real: phone home on a schedule rather than waiting to feel like it, keep one off-farm friend in the loop (the Matey chat exists at 9pm on a farm for exactly this), get sunlight and one non-work activity into each week, and go easy on the goon, because alcohol plus isolation is a lift going down. And know the exit is allowed: your 88 days transfer to any other compliant farm, so a situation that is grinding you down can be left without losing a single day of visa progress. If the low goes darker than homesickness, talk to someone today, not at the end of the season: Lifeline on 13 11 14 and Beyond Blue on 1300 22 4636 are free, 24/7, and talk to anyone in Australia, visa status irrelevant. Check on your quiet workmates too; the person who stopped coming to dinner is the person to knock for.
The little stuff that actually gets you
Mozzies carry Ross River virus and friends in the tropics and along rivers: repellent at dawn and dusk is non-negotiable, and long sleeves at sunset beat any spray. Ticks live in east-coast scrub: check yourself (hairline, waistband, behind knees) after bushwalks, and remove them with fine tweezers by the head or freeze-spray, never squeeze the body. Never touch a dead or 'sleeping' bat, however cute; Australian bat lyssavirus is rare and lethal, and bat handling is for vaccinated wildlife carers only. Rock pools: blue-ringed octopus and cone shells are genuinely deadly and genuinely pretty, so look, photograph, and pick up nothing. In the tropics, marine stinger season means swim in the netted enclosures and listen to the lifeguard signs, and reef cuts get cleaned properly because tropical wounds infect fast. Wear gloves in farm sheds (redbacks, above), wash hands before smoko (chemicals), and keep tetanus boosters current, because rusty fence wire is the true apex predator of the working holiday. And the drop bears? The drop bears are fine. Ask your hostel about the drop bears.