Bushfire safety for bushwalkers and canyoners:

Back to the Bush Guide

— Tim Vollmer

There are two universal truths about the Australian bush: it is breathtaking beautiful and potentially deadly. Whether it’s snakes, spiders, the elusive Penrith Panther, flash floods, thunderstorms, falling rocks, raging fires, howling winds or falling trees, there’s no shortage of potential risks to be aware of.

Last summer was particularly bad in the Blue Mountains, with several fires destroying more than 200 homes, and burning huge swathes of wilderness — including some of our most popular canyoning and bushwalking areas. Above-average temperatures and below-average rainfall in recent months have resulted in official warnings that this summer could be even worse.

The risk of bushfires isn’t a reason to avoid going into the wild, but it is something to be aware of. The article below is a compilation of the best advice I could find — along with my own recollections from Rural Fire Service training — and hopefully provides some useful tips, insights and skills to help you minimise the risks.

 

DISCLAIMER: This is general advice. Each situation is different and everyone has to make their own assessments of the particular risks they face. Don’t take anything below as ‘gospel truth’. Instead, use it to shape a more informed and thought-out way of dealing with potential fire risks on your trips over summer. Any activities in the bush carry risks. We don’t take any responsibility for any incidents or accidents caused by people blindly following the points below.

Smoke rising from a distant bushfire

Smoke rising from a distant bushfire

How serious is the risk of fire?

Bushfires are a common occurrence in Australia, with parts of south-eastern Australia among the most bushfire prone areas on earth. Despite this, the chances of a fire starting in an area you are walking is are actually quite low. Many bushland areas will go for decades between natural fires.

Things like dry lightning strikes, flying embers from an existing fire, or the careless actions of humans can all ignite a fire. While fires start small, they can quickly turn into something serious in dry, warm, windy conditions, allowing an emergency to quickly develop even in an area that was fire-free when you entered it.

Even a small bushfire can pose a serious threat to life, and requires appropriate actions to be safely dealt with. This can be hard when operating under the stress of a fast-approaching fire.

It is important to remember that fire can injure or kill in a number of different ways, and that the flames are only one of the dangers. Direct contact with flames will cause physical burns, the smoke and hot gases can cause asphyxiation and radiant heat from the fire can induce heat stroke.

In recent years there have been examples of people, including highly experienced event organisers, caught out because they underestimated fire risks. In 2011 a bushfire trapped several ultra-marathon runners in Western Australia, causing life-threatening injuries to two people and injuring a number of others.

Factors that decide how a fire behaves:

There are three main factors that will impact on how a fire behaves: weather, fuel, and topography.

The intensity and speed a fire moves in are largely determined by the type, amount, and moisture content of the fuel that is burning. Fire can move extremely fast in grassland, but is usually less intense, while in more thickly forested areas it will burn with more intensity, but usually move more slowly. Dry, fine fuel (less than 8mm in diameter) will produce a quicker moving fire, while vegetation that is damp, sparse or composed of larger material will generally result in a slower moving fire.

Fires will burn more intensely if the weather is hot and dry, while cooler weather or increased humidity will reduce it. Wind not only makes fires move more quickly, changes to wind directions can radically alter a fire’s behaviour. Fire travels with the wind, rather than against it.

The landform will also have a major impact on the fire’s behaviour. Fires move much faster going uphill, roughly doubling in speed for each 10 degree increase in the slope. This is because the fire is able to dry and heat the fuel ahead of it, speeding the combustion process.

Understanding these factors, and using them to take appropriate actions, is integral to surviving a bushfire.

Bushfire burning though the Grose Valley in the Blue Mountains

Bushfire burning though the Grose Valley in the Blue Mountains

Things to do before heading into the bush:

There are many things that can be done to limit the risks posed by fire, but the only way to truly eliminate any risk is to simply not enter the bush. Given that isn’t a choice most of us are willing to make, it is essential that we properly prepare to minimise risks as much as possible.

Check the expected weather conditions. Heat, dry weather and strong winds all increase fire risks. Thunderstorms often spark fires. Consider scheduling your trips for a time of lower risk (although this is hard for canyoners, who are drawn out by the hot weather). Extreme fires usually occur when temperatures are in the mid-30s or higher, relative humidity is less than 15 per cent, and winds are hot, dry and greater than 30 km/h.

Check for any alerts regarding nearby fires, along with predicted fire danger ratings. In the cooler months authorities also carry out extensive hazard reduction burns, so check that there are no fires planned for the area you are walking in before entering.

Check for any closures relating to the area you are walking, or fire bans that will prevent you lighting fires or using fuel stoves.

Ensure your trip intentions are known. Consider registering your planned walk with police, NPWS, or other appropriate authorities. Inform a friend or loved one of your planned route, allowing them to notify authorities of your presence if a fire occurs. Include party size, intended route, and estimated arrival time.

Plan your route to include possible escape routes or to allow easy access to areas that offer refuge from fire, like natural water sources, open rocky ground, clearings, etc. Depending on where you are along your planned route the best escape option could be to retrace your steps, exit via a side route, or continue on to the planned finish point. Take into account likely wind directions which could be fanning a fire (they are usually hot dry winds coming from the north or west).

Take clothing that will provide protection from radiant heat. Synthetic fibres can melt and cause severe burns. Natural fibres like wool and cotton will offer greater protection.

Consider carrying an emergency personal locator beacon (PLB). This can help emergency services quickly locate you in the event of a life-threatening situation.

Make sure someone in your group knows how to provide first aid for injuries such as burns, shock, asphyxiation, smoke inhalation, heat induced illness, etc.

Things to do while walking, even if there is no fire:

Being able to move to the nearest safe place in the case of a fire requires you to know exactly where you are at all times. Put a greater focus on your navigation so that any decisions made in an emergency are based on a precise knowledge of your current location.

Keep track of possible features that could provide refuge from fire, allowing better decision making if you do encounter a blaze. Don’t just examine what shelter is available, but also consider the most efficient, and safest way, of reaching it.

Keep your eyes (and nose) on the lookout for smoke. When high points are encountered, take a moment to scour the horizon for possible fires, particular in the direction the wind is coming from. If you see smoke, consider turning back or finding an alternate route.

Watch out for increased air traffic. A serious fire will almost always be responded to by a large number of aircraft, both for water bombing and to provide real-time intelligence about how the fire is moving. These aircraft can be an early warning of a nearby fire.

Pay attention to the terrain you are moving through, looking at steepness, the fuel loads in different parts of the topography, and other factors that might influence how a fire would move.

Keep track of wind direction and strength, as well as considering likely changes that could occur.

Take a small radio and listen to local weather and fire updates.

Ensure you remain well hydrated, and are carrying plenty of water with you.

Fire conditions are usually worse in the afternoon, so walking earlier in the day and moving quickly can reduce your risk. If there is a distant fire, consider ditching non-essential gear or consumables like food to allow you to move more quickly to a safer area.

Be careful with your campfires:

The bushwalkers code of ethics contains extremely useful advice for ensuring you do not create fire risks. It is well worth any outdoor enthusiast reading it before going bush.

Only ever light a fire if you are certain it can be done safely. If in doubt, use a stove for cooking and thermal clothing for warmth. Never light a fire in environmentally sensitive areas, such as alpine regions, rainforest, canyons, or on bare rock.

Do not light fires in hot, dry, windy weather condition or when there is a fire ban in place.

If you do light a fire, do it on bare sand or soil where possible. Ensure it is away from stumps, logs, living plants or river stones (which can explode). Sweep leaves, grass and other flammable material away from your fireplace.

Keep your fire small and do not leave it unattended.

Before leaving, ensure the fire is thoroughly out. Douse any embers with water. Scatter or bury the cold charcoal and ashes.

A wall of flames moving through the Grose Valley

A wall of flames moving through the Grose Valley

If you are faced with a bushfire:

It is essential that you don’t panic, but instead remain calm and plan your actions carefully.

Never try to outrun the fire.

Remember that fires move fastest, and burn strongest, at the front. You are far better heading to the side, or flank, where the fire will likely be burning with less intensity.

Never go uphill, unless you know of an extremely well protected refuge nearby. Fires will burn with the greatest intensity at the top of hills, and move fastest as they climb the slopes. It is almost always best to move downhill.

Move to areas with lower fuel loads, such as spots where fuel is sparser, or simply larger or wetter so it will burn more slowly. Rocky outcrops, hollows, fire trails, previously burnt ground, heavily grazed areas, eroded gullies, holes made by fallen trees, or any other place without combustible material are ideal. Clear any remaining leaves or vegetation which could burn away from your shelter.

Avoid direct flame contact.

Find an area that won’t burn such as lakes, creeks or canyons.

Smoke and hot gases can cause asphyxiation and even burn the inside of your airways. Keep as low as possible, breathing into the ground, and cover your mouth and nose with a wet cloth to avoid breathing superheated air and smoke.

Radiant heat can be as deadly as the flames. Lie down on the ground and cover yourself as much as possible. Take advantage of large rocks, logs, or depressions in the ground. Place soft, moist soil over your skin. Even sheets of thick bark or slabs of wood can protect you from radiant heat. Look for anything that will deflect or absorb the radiant heat. Remember that radiant heat travels in straight lines. Radiant heat can cause heat stroke, which is when the body’s cooling system fails, leading to heat exhaustion and heart failure.

Wear natural fibres (cotton or wool) that cover as much of your skin as possible. Avoid synthetic materials except as a last resort. It is wise to have long pants and a long-sleeved shirt with you when walking in a bushfire prone area.

Do not wet your clothing unless it can be kept wet while the fire front passes. Water is a good conductor of heat and wet clothes can produce scalds.

Drink water regularly to avoid dehydration.

Make sure you look after the safety of your whole group. Never let someone shelter alone. Use the buddy system. Don’t separate or lose sight of each other. Monitor the behaviour of all party members, and in particular watch for signs of panic. One person panicking and breaking away from the group can put the whole group at serious risk.

Move to burnt ground once the fire has passed. Be aware of the residual dangers residing on burnt ground, including falling branches or trees, burning logs, or burning tree stumps.

Never shelter in an elevated water tank. Above ground tanks can heat up quickly. A human immersed in warm water cannot sweat or lose heat, and water temperatures as low as 44ºC can lead to a loss of consciousness in a matter of minutes.

If you have a mobile phone, call for help, or if you are carrying a PLB, set it off.

Make yourself highly visible, which will help helicopters spot you. Authorities will likely fly over known walking tracks, campsites and other popular areas in the path of the fire.

Running through the flames should only ever be attempted as a last resort, when no safe shelter can be reached. It is not recommended by fire authorities. It should only be attempted if you can see clearly behind the flames, so they are less than 1 metre high and 3 metres deep. If you must run through the fire, move to the flanks or areas burning with less intensity, look for a lull in the fire, seek areas with fairly clear ground, and avoid areas with potential obstructions or obstacles. Take a deep breath low to the ground, then cover your face and run through the flames to already burnt ground.

Encountering fire while driving to or from a trip:

If you come across smoke or fire while driving, the safest course of action is usually to return the way you have come. Fallen branches or trees can easily block your way, preventing your escape from the fire. If you are driving through smoke turn your headlights on to make yourself more visible to other vehicles, slow down, keep watch for firefighters and emergency vehicles. Turn your air-conditioning on and recirculate the air to limit how much smoke enters your car.

If you are trapped by a fire while driving, stay in the vehicle, as research shows this offers the best chance of survival.

Park your vehicle in an area that provides the greatest protection from both radiant heat and flames, such as a roadside clearing or against an embankment. Do not stop under trees that could fall on your vehicle. Avoid stopping in the middle of the road where you could be struck by other vehicles. Keep the engine running, with all windows and vents closed. Turn your hazard lights on. Lie down on the floor of the vehicle and cover yourself with anything that will protect you from radiant heat, such as a woollen blanket. Drink plenty of water. Wait for the fire front to completely pass.

It is a good idea to keep woollen blankets and drinking water in your car just in case you are forced to use your car as a refuge from a bushfire.

*       *       *       *       *

Have we missed anything? Do you have any other good tips to help reduce the risks posed by bushfires or maximise the chances of survival? If so, leave us a comment and we’ll incorporate it into the article.

Back to the Bush Guide

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13 thoughts on “Bushfire safety for bushwalkers and canyoners:

  1. Thanks so much for the article! Really useful advice for bushwalkers who might not often think about the risks posed by fire. I’d like to add a reminder for people to check the rfs website EVERY time you are planning a walk, REGARDLESS of time of year or weather, to check for any planned hazard reduction burns. While not as dangerous as a wildfire, they still pose a very serious and completely avoidable risk. I’ve learnt this lesson from experience, having walked into a hazard reduction burn area myself once – a scary experience.

    • Great tip. Last year there was more hazard reduction burning than ever before, so the chances of getting caught by a planned fire in the cooler months is greater than ever!

  2. Hi Tim, great write up. I’d also like to remind people that a fire that is still warm is not off, so you shouldn’t light fires in the morning or for lunch. If you put out your evening camp fire before you go to sleep it will be cold in the morning and you can leave safely (and you even have the chance to clean up the fire scar properly). The morning coffee can very well be cooked on a stove instead.

  3. Although I’m more than a year late – what a fantastic article! I was planning on writing my own post about the dangers of bushfires for bushwalkers, but there’s nothing left to say. I will stress how important it is to check the conditions before you head out, and to also be mindful of suspicious activity in the area as arson is one of the leading causes of bushfires in Australia. I write a bushfire safety blog, and would love to include this post on the blog as I think it’s an absolute must read for anyone who loves to get outdoors! This is my blog – bushfiresafe.wordpress.com/ – if you want a further look! Keep up the good work!4

  4. if you are in a fire you cah light a back burn and follow it . but only if you are in danger as you are making the fire bigger and could endanger others

    • Most of the expert advice I have read advises against this. The odds are any fire you light will be driven by the same wind as the main fire front, so won’t burn back towards the main fire. You will effectively start a spot fire that could lead to you being trapped. In the time it would take to light a fire big enough to burn a safe area, you would be able to move a decent distance and find better protection.

  5. Great article, and some really nice tips to remember how to walk safely in the bush.

    Interesting advise about staying put in your car and waiting for the fire front to pass with the engine turned on. Perhaps I’ve watched too many movies with exploding vehicles, but is it really safe to stay put in something that is still turned on and running on highly flammable/explosive liquid?

    I sure wouldn’t like to test it, but that said I could imagine a scenario where there’s simply nothing else to shelter in….

    • Yeah, too many movies… There’s some really good footage online of fire trucks being tested. The external plastic on a vehicle will melt and catch fire long before the fuel will.

      • This is a pretty useful article about what to expect when the fire-front passes over your car:
        http://www.gpem.uq.edu.au/ohs/ohs-docs/Fire-guidlines-people-in-vehicles.pdf
        They do agree that the car is unlikely to explode, although the fuel may produce fumes that you want to avoid inhaling too much off. They also suggest turning off the engine, which is opposite to what you’ve recommended. Considering the car is unlikely to be drivable afterwards, I’m not sure if keeping the engine going makes sense….

      • There is a lot of different info around. The NSW RFS guidebook for firefighters says to leave the engine running. The Tasmanian and WA fire services also advise to leave the engine running. A running engine won’t make any difference to the risk of a car exploding. Petrol simply won’t explode without the right air mix, so it isn’t a risk.
        Leaving the car running has some benefits. On a hot day, it is very stifling in a sealed up car. Heat and dehydration are what will likely kill you. So leaving the engine running, with the air-condition on high, right until the fire front is about to impact you should minimise that risk. I’d have the AC on recirculate, but at the point where the fire actually approached the car I’d close the vents and turn off the air, to avoid fumes getting in.
        They also advise leaving headlights and hazard lights on, to make sure someone doesn’t crash into you. If you have to stop in thick smoke for a period of time, the battery may well run low, so that’s possibly another reason for the engine to stay running.

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