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The dead man zone is the area directly around a bushfire that is likely to burn within five minutes given the current wind conditions or an anticipated change in wind direction. The distance this zone extends from the firefront is highly dependent on terrain, windspeed, fuel type and composition, relative humidity and ambient temperature, and can range from under 100 m to well over 1 km. [1]
The term dead man zone was coined by members of the CSIRO research team in Australia who were investigating the spread of bushfires (Project Vesta). The dead man zone is approximately 5 miles around the fire that is likely to burn. This dead man zone can be a safety net for firefighters if the fire is moving at a high speed. The dead man zone can also be prepared in a way that slows down the fire. Firefighters can get outside the dead man zone safely without seeing what the fire is going to do and develop a plan of attack or defense upon the fire's next move. If the dead man zone is not used, wind change can sneak up on the firefighters and resulting in potentially unsafe distances where they are not able to defend themselves. This can be a life or death situation if not approached properly, and there have been examples of firefighters that became trapped and ultimately killed in Australia. [2] Project Vesta, headed by scientist Phil Cheney, found that when the wind changes direction, the line of fire will move out at its maximum rate of spread almost immediately, and that the spread speed was nearly three times what was previously thought. Project Vesta's research into bushfire behavior makes up the majority of what is known about bushfires today. [3]
Outcomes from Project Vesta have been integrated into firefighter training in Australia and are beginning to appear in the United States.
Firefighters try to stay out of the dead man zone at all times, working from safe points such as burnt ground or a large area of non-burnable ground, such as a cricket or Australian rules football oval, or a large car park. This is achieved by attacking the fire from the flanks, or the rear, so that burnt ground is always nearby, and the fire is always in front of the firefighters. This avoids two disadvantages of attacking fires at the head of the fire where spot fires may start behind them or changes in wind behavior might accelerate the spread of the fire.
The result of several inquiries into firefighter death in Australian bushfires found that firefighters should stay out of the dead man zone and that they should always keep 250 liters of water in their truck for personal safety. This is now a standard operating procedure in the NSW Rural Fire Service, Country Fire Service and Country Fire Authority in Australia.
The Ash Wednesday bushfires, known in South Australia as Ash Wednesday II, were a series of bushfires that occurred in south-eastern Australia on 16 February 1983, which was Ash Wednesday. Within twelve hours, more than 180 fires fanned by winds of up to 110 km/h (68 mph) caused widespread destruction across the states of Victoria and South Australia. Years of severe drought and extreme weather combined to create one of Australia's worst fire days in a century. The fires became the deadliest bushfire in Australian history until the Black Saturday bushfires in 2009.
The Linton Bushfire was a wildfire that burned through private land and state forests near the township of Linton, Victoria, Australia on 2 December 1998. Firefighters from the Victorian state government's Department of Natural Resources and Environment and the Country Fire Authority (CFA) were deployed to put out the fire. At approximately 8.45pm, two firefighting appliances and their crews were entrapped and engulfed in fire following an unexpected wind change. The bushfire covered a maximum land of 660 hectares of private and public land.
This glossary of wildfire terms is a list of definitions of terms and concepts relevant to wildfires and wildland firefighting. Except where noted, terms have largely been sourced from a 1998 Fireline Handbook transcribed for a Conflict 21 counter-terrorism studies website by the Air National Guard.
Wildfire suppression is a range of firefighting tactics used to suppress wildfires. Firefighting efforts in wild land areas require different techniques, equipment, and training from the more familiar structure fire fighting found in populated areas. Working in conjunction with specially designed aerial firefighting aircraft, these wildfire-trained crews suppress flames, construct fire lines, and extinguish flames and areas of heat to protect resources and natural wilderness. Wildfire suppression also addresses the issues of the wildland–urban interface, where populated areas border with wild land areas.
One of the most extensive bushfire seasons in Australia's history. Victoria experienced the longest continuously burning bushfire complex in Australia's history, with fires in the Victorian Alps and Gippsland burning over 1 million hectares of land over the course of 69 days. See Bushfires in Australia for an explanation of regional seasons.
The 1994 eastern seaboard fires were significant Australian bushfires that occurred in New South Wales, Australia during the bushfire season of 1993–1994. Some 20,000 firefighters were deployed against some 800 fires throughout the state, and along the coast and ranges from Batemans Bay in the south to the Queensland border in the north, including populated areas of the city of Sydney, the Blue Mountains and the Central Coast. The fires caused mass evacuations of many thousands of people, claimed four lives, destroyed some 225 homes and burned out 800,000 hectares of bushland. The firefighting effort raised in response was one of the largest seen in Australian history.
Bushfires in Australia are a widespread and regular occurrence that have contributed significantly to shaping the nature of the continent over millions of years. Eastern Australia is one of the most fire-prone regions of the world, and its predominant eucalyptus forests have evolved to thrive on the phenomenon of bushfire. However, the fires can cause significant property damage and loss of both human and animal life. Bushfires have killed approximately 800 people in Australia since 1851, and billions of animals.
The Black Saturday bushfires were a series of bushfires that either ignited or were already burning across the Australian state of Victoria on and around Saturday, 7 February 2009, and were among Australia's all-time worst bushfire disasters. The fires occurred during extreme bushfire weather conditions and resulted in Australia's highest-ever loss of human life from a bushfire, with 173 fatalities. Many people were left homeless as a result.
A bushfire season occurred predominantly from June 2009 to May 2010. Increased attention has been given to this season as authorities and government attempt to preempt any future loss of life after the Black Saturday bushfires during the previous season, 2008–09. Long range weather observations predict very hot, dry and windy weather conditions during the summer months, leading to a high risk of bushfire occurrence.
The summer of 2012–13, had above average fire potential for most of the southern half of the continent from the east coast to the west. This is despite having extensive fire in parts of the country over the last 12 months. The reason for this prediction is the abundant grass growth spurred by two La Niña events over the last two years.
The 2013 Tasmanian bushfires were a series of bushfires which occurred in south-eastern Tasmania, Australia, between November 2012 and late April 2013. The fires burnt approximately 20,000 hectares of mixed resident land and native forest.
The 2013 Cherryville Bushfire occurred on 9–11 May 2013 near the Adelaide Hills townships of Cherryville, Marble Hill and Basket Range, South Australia.
The 2013 New South Wales bushfires were a series of bushfires in Australia across the state of New South Wales primarily starting, or becoming notable, on 13 October 2013; followed by the worst of the fires beginning in the Greater Blue Mountains Area on 16 and 17 October 2013.
The bushfire season in the summer of 2014–15, was expected to have the potential for many fires in eastern Australia after lower than expected rainfall was received in many areas. Authorities released warnings in the early spring that the season could be particularly bad.
The most destructive bushfire season in terms of property loss since the 2008–09 Australian bushfire season, occurred in the summer of 2015–16, with the loss of 408 houses and at least 500 non-residential buildings as a result of wild fires between 1 June 2015 and 31 May 2016. The season also suffered the most human fatalities since the 2008–09 Australian bushfire season; 6 died in Western Australia, 2 in South Australia and 1 in New South Wales. 8 deaths were as a direct result of fire, and a volunteer firefighter died due to unrelated health complications while on duty.
The bushfire season of the summer of 2017–18, was expected to have above normal bushfire risks with an elevated fire risk for the most of eastern and south Australian coastal areas. Australia had experienced its warmest winter on record and the ninth driest winter on record leaving dry fuel loads across much of southern Australia. Expected warmer weather over the summer period would also increase the risk. Bushfires were also expected to occur earlier, before the end of winter, as a result of the warm and dry winter. Both Queensland and north-eastern New South Wales experienced the wettest October since 1975 leading to a downgrade in bushfire risk.
The development of aerial firefighting and forestry in southern Australia ran in parallel with the rapid improvements in aircraft technology over the last century. As more advanced and capable aircraft became available firefighters and foresters quickly sought opportunities to utilise and adapt them.
The 2019–20 Australian bushfire season, colloquially known as the Black Summer, was a period of unusually intense bushfires in many parts of Australia.
Following the devastating 2019–20 bushfires in Australia, authorities were urged to prepare early for the 2020–21 season. The bushfire outlook for July to September 2020 was predicting a normal fire potential in Queensland with a good grass growth in many areas giving an increased risk of grass fires, an above normal season in the Kimberley region of Western Australia as a result of good rains from tropical cyclones, a normal but earlier season in the Northern Territory, an above normal season on the south coast of New South Wales and normal seasons elsewhere.
The 2021 Wooroloo bushfire was a fast moving bushfire that started on 1 February in Wooroloo, 45 kilometres (28 mi) north-east of the Perth central business district, in the Shire of Mundaring, Western Australia. By 2 February, the bushfire emergency had spread to Shires of Chittering and Northam, and the City of Swan. It had destroyed at least 86 houses and 2 fire trucks. By 6 February, the bushfire had travelled 26 km (16 mi) from its source. The fire coincided with a five day lockdown of the Perth metropolitan region that started at 6pm on 31 January, due to a case of COVID-19 outside of hotel quarantine. In July 2021, WA Police charged a man with a breach of duty and carrying out an activity that could cause a fire, alleging that he used an angle grinder that caused sparks.
