A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire(in Australia), desert fire, grass fire, hill fire, peat fire, prairie fire, vegetation fire, or veld fire. Some natural forest ecosystems depend on wildfire.
A firestorm is a conflagration which attains such intensity that it creates and sustains its own wind system. It is most commonly a natural phenomenon, created during some of the largest bushfires and wildfires. Although the term has been used to describe certain large fires, the phenomenon's determining characteristic is a fire with its own storm-force winds from every point of the compass towards the storm's center, where the air is heated and then ascends.
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 hot 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 were the deadliest bushfire in Australian history until the Black Saturday bushfires in 2009.
The 2003 Canberra bushfires caused severe damage to the suburbs and outer areas of Canberra, the capital city of Australia, during 18–22 January 2003. Almost 70% of the Australian Capital Territory's (ACT) pastures, pine plantations, and nature parks were severely damaged, and most of the Mount Stromlo Observatory was destroyed. After burning for a week around the edges of the ACT, the fires entered the suburbs of Canberra on 18 January 2003. Over the next ten hours, four people died, over 490 were injured, and 470 homes were destroyed or severely damaged, requiring a significant relief and reconstruction effort.
The Forest fire weather index (FWI) is an estimation of the risk of wildfire computed by Météo France and the Meteorological Service of Canada. It was introduced in France in 1992 but is based on a Canadian empirical model developed and widely used since 1976.
The 1967 Tasmanian fires were an Australian natural disaster which occurred on 7 February 1967, an event which came to be known as the Black Tuesday bushfires. They were the most deadly bushfires that Tasmania has ever experienced, leaving 62 people dead, 900 injured and over seven thousand homeless.
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.
The Keetch–Byram drought index, created by John Keetch and George Byram in 1968 for the United States Department of Agriculture's Forest Service, is a measure of drought conditions. It is commonly used for the purpose of predicting the likelihood and severity of wildfire. It is calculated based on rainfall, air temperature, and other meteorological factors.
National Fire Danger Rating System (NFDRS) is used in the United States to provide a measure of the relative seriousness of burning conditions and threat of wildfires.
In computational science, wildfire modeling is concerned with numerical simulation of wildland fires in order to understand and predict fire behavior. Wildfire modeling can ultimately aid wildland fire suppression, namely increase safety of firefighters and the public, reduce risk, and minimize damage. Wildfire modeling can also aid in protecting ecosystems, watersheds, and air quality.
The Australian bushfire season ran from late December 2008 to April/May 2009. Above average rainfalls in December, particularly in Victoria, delayed the start of the season, but by January 2009, conditions throughout South eastern Australia worsened with the onset of one of the region's worst heat waves. On 7 February, extreme bushfire conditions precipitated major bushfires throughout Victoria, involving several large fire complexes, which continued to burn across the state for around one month. 173 people lost their lives in these fires and 414 were injured. 3,500+ buildings were destroyed, including 2,029 houses, and 7,562 people displaced.
The state of Victoria in Australia has had a long history of catastrophic bushfires, the most deadly of these, the Black Saturday bushfires of 2009 claiming 173 lives. Legislation, planning, management and suppression are the responsibilities of the Victorian State Government through its departments and agencies including the Country Fire Authority (CFA) and the Department of Environment, Land, Water and Planning (DELWP).
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.
The Black Thursday bushfires were a devastating series of fires that swept the state of Victoria, Australia, on 6 February 1851, burning up 5 million hectares, or about a quarter of the state's area. Twelve people died, along with one million sheep, thousands of cattle and countless native animals.
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 ACT Rural Fire Service is a branch of the Australian Capital Territory Emergency Services Agency. It is responsible for the prevention, detection and extinguishment of all bushfires within the ACT, as well as assisting the other branches of ESA.
The 2015 Esperance bushfires were a series of catastrophic bushfires that burned from 15 to 26 November and affected the Goldfields-Esperance region in the Australian state of Western Australia. During the fires, the Shire of Esperance experienced two significant fires and a complex of fires; 128,000 hectares were burnt by the Cascades fire, 18,000 hectares were burnt by the Merivale fire, and 164,000 hectares were burnt by the Cape Arid complex of fires. On 17 November, during the major run of the Cascades fire, four civilian fatalities occurred in vehicles traveling on Griggs Road in Scaddan. As of 2020, the Cascades fire was equally the worst bushfire in Western Australia in terms of human fatalities along with the Willow Springs/Nannup fire of January 1958.
The 2019–20 Australian bushfire season or Black Summer was a period of bushfires in many parts of Australia, which, due to its unusual intensity, size, duration, and uncontrollable dimension, is considered a megafire. The Australian National University reported that the area burned in 2019–2020 was "well below average" due to low fuel levels and fire activity in unpopulated parts of Northern Australia, but that "Despite low fire activity overall, vast forest fires occurred in southeast Australia from southeast Queensland to Kangaroo Island."
