76-816: The Great Fire of 1910 (also commonly referred to as the Big Blowup , the Big Burn , or the Devil's Broom fire ) was a wildfire in the Inland Northwest region of the United States that in the summer of 1910 burned three million acres (4,700 sq mi; 12,100 km, approximately the size of Connecticut ) in North Idaho and Western Montana , with extensions into Eastern Washington and Southeast British Columbia . The area burned included large parts of
152-539: A bushfire 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. Wildfires are different from controlled or prescribed burning , which are carried out to provide
228-570: A defensible space be maintained by clearing flammable materials within a prescribed distance from the structure. Communities in the Philippines also maintain fire lines 5 to 10 meters (16 to 33 ft) wide between the forest and their village, and patrol these lines during summer months or seasons of dry weather. Continued residential development in fire-prone areas and rebuilding structures destroyed by fires has been met with criticism. The ecological benefits of fire are often overridden by
304-469: A 15 mile radius. Additionally, Sensaio Tech , based in Brazil and Toronto, has released a sensor device that continuously monitors 14 different variables common in forests, ranging from soil temperature to salinity. This information is connected live back to clients through dashboard visualizations, while mobile notifications are provided regarding dangerous levels. Satellite and aerial monitoring through
380-470: A 24-hour fire day that begins at 10:00 a.m. due to the predictable increase in intensity resulting from the daytime warmth. Climate change promotes the type of weather that makes wildfires more likely. In some areas, an increase of wildfires has been attributed directly to climate change. Evidence from Earth's past also shows more fire in warmer periods. Climate change increases evapotranspiration . This can cause vegetation and soils to dry out. When
456-663: A benefit for people. Modern forest management often engages in prescribed burns to mitigate fire risk and promote natural forest cycles. However, controlled burns can turn into wildfires by mistake. Wildfires can be classified by cause of ignition, physical properties, combustible material present, and the effect of weather on the fire. Wildfire severity results from a combination of factors such as available fuels, physical setting, and weather. Climatic cycles with wet periods that create substantial fuels, followed by drought and heat, often precede severe wildfires. These cycles have been intensified by climate change . Wildfires are
532-485: A common type of disaster in some regions, including Siberia (Russia), California (United States), British Columbia (Canada), and Australia . Areas with Mediterranean climates or in the taiga biome are particularly susceptible. Wildfires can severely impact humans and their settlements. Effects include for example the direct health impacts of smoke and fire, as well as destruction of property (especially in wildland–urban interfaces ), and economic losses. There
608-502: A deciduous sheath. The needles are finely serrated, and 5–13 cm (2–5 in) long. The cones, appearing even on young trees, are long and slender, 12–32 cm ( 4 + 3 ⁄ 4 – 12 + 1 ⁄ 2 in) long and 3–4 cm ( 1 + 1 ⁄ 4 – 1 + 1 ⁄ 2 in) broad (closed), opening to 5–8 cm (2– 3 + 1 ⁄ 4 in) broad; the scales are thin and flexible. The seeds are small, 4–7 mm ( 3 ⁄ 16 – 1 ⁄ 4 in) long, and have
684-610: A fire starts in an area with very dry vegetation, it can spread rapidly. Higher temperatures can also lengthen the fire season. This is the time of year in which severe wildfires are most likely, particularly in regions where snow is disappearing. Weather conditions are raising the risks of wildfires. But the total area burnt by wildfires has decreased. This is mostly because savanna has been converted to cropland , so there are fewer trees to burn. Climate variability including heat waves , droughts , and El Niño , and regional weather patterns, such as high-pressure ridges, can increase
760-449: A large crew of about 44 men to safety in an abandoned prospect mine outside of Wallace, Idaho , just as they were about to be overtaken by the fire. It is said that Pulaski fought off the flames at the mouth of the shaft until he passed out like the others. Around midnight, a man announced that he, at least, was getting out of there. Knowing that they would have no chance of survival if they ran, Pulaski drew his pistol, threatening to shoot
836-644: A long slender wing 15–22 mm ( 9 ⁄ 16 – 7 ⁄ 8 in) long. The branches are borne in regular whorls , produced at the rate of one a year; this is pronounced in narrow, stand-grown trees, while open specimens may have a more rounded form with wide-reaching limbs. When mature, the tree has bark that appears to be cut into small, checkered units. It is related to the Eastern white pine ( Pinus strobus ), differing from it in having larger cones, slightly longer-lasting leaves (2–3 years, rather than 1.5–2 years) with more prominent stomatal bands, and
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#1732794375290912-413: A major part of Wallace, were saved by backfires . The smoke from the fire went as far to the east as New York City, and as far south as Dallas. The Great Fire of 1910 cemented and shaped the U.S. Forest Service, which at the time was a newly established department on the verge of cancellation, facing opposition from mining and forestry interests. Before the epic conflagration, there were many debates about
988-546: A new fire detection tool is in operation at the U.S. Department of Agriculture (USDA) Forest Service (USFS) which uses data from the Suomi National Polar-orbiting Partnership (NPP) satellite to detect smaller fires in more detail than previous space-based products. The high-resolution data is used with a computer model to predict how a fire will change direction based on weather and land conditions. In 2014, an international campaign
1064-415: A number expected to rise to 30,000 by 2050. The economic impact is also significant, with projected costs reaching $ 240 billion annually by 2050, surpassing other climate-related damages. Over the past century, wildfires have accounted for 20–25% of global carbon emissions, the remainder from human activities. Global carbon emissions from wildfires through August 2020 equaled the average annual emissions of
1140-545: A policy of allowing some wildfires to burn is the cheapest method and an ecologically appropriate policy for many forests, they tend not to take into account the economic value of resources that are consumed by the fire, especially merchantable timber. Some studies conclude that while fuels may also be removed by logging, such thinning treatments may not be effective at reducing fire severity under extreme weather conditions. Building codes in fire-prone areas typically require that structures be built of flame-resistant materials and
1216-503: A possible resolution to human operator error. These systems may be semi- or fully automated and employ systems based on the risk area and degree of human presence, as suggested by GIS data analyses. An integrated approach of multiple systems can be used to merge satellite data, aerial imagery, and personnel position via Global Positioning System (GPS) into a collective whole for near-realtime use by wireless Incident Command Centers . A small, high risk area that features thick vegetation,
1292-455: A program for locating and breeding rust-resistant Western white pine and sugar pine . Seedlings of these trees have been introduced into the wild. The gum was reportedly chewed by Native Americans to treat coughs. The pitch was used to fasten arrowheads and coat fishing and whaling instruments. European colonists used both Western and Eastern white pine as softwood lumber. Both species are considered excellent for molding and carving. First
1368-531: A rapid forward rate of spread (FROS) when burning through dense uninterrupted fuels. They can move as fast as 10.8 kilometres per hour (6.7 mph) in forests and 22 kilometres per hour (14 mph) in grasslands. Wildfires can advance tangential to the main front to form a flanking front, or burn in the opposite direction of the main front by backing . They may also spread by jumping or spotting as winds and vertical convection columns carry firebrands (hot wood embers) and other burning materials through
1444-695: A remote site and sent via overnight mail to the fire manager . During the Yellowstone fires of 1988 , a data station was established in West Yellowstone , permitting the delivery of satellite-based fire information in approximately four hours. Public hotlines, fire lookouts in towers, and ground and aerial patrols can be used as a means of early detection of forest fires. However, accurate human observation may be limited by operator fatigue , time of day, time of year, and geographic location. Electronic systems have gained popularity in recent years as
1520-705: A somewhat denser and narrower habit. The species occurs in humid areas of the mountains of the Western United States and Western Canada such as the Sierra Nevada , the Cascade Range , the Coast Range , and the northern Rocky Mountains . It can be found in elevations of 600 to 1,800 meters (2,000 to 5,900 ft) above sea level in eastern Washington and Oregon's Blue Mountains and 1,800 to 3,100 metres (5,900 to 10,200 ft) on
1596-569: A strong human presence, or is close to a critical urban area can be monitored using a local sensor network . Detection systems may include wireless sensor networks that act as automated weather systems: detecting temperature, humidity, and smoke. These may be battery-powered, solar-powered, or tree-rechargeable : able to recharge their battery systems using the small electrical currents in plant material. Larger, medium-risk areas can be monitored by scanning towers that incorporate fixed cameras and sensors to detect smoke or additional factors such as
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#17327943752901672-779: A susceptible area: an ignition source is brought into contact with a combustible material such as vegetation that is subjected to enough heat and has an adequate supply of oxygen from the ambient air. A high moisture content usually prevents ignition and slows propagation, because higher temperatures are needed to evaporate any water in the material and heat the material to its fire point . Dense forests usually provide more shade, resulting in lower ambient temperatures and greater humidity , and are therefore less susceptible to wildfires. Less dense material such as grasses and leaves are easier to ignite because they contain less water than denser material such as branches and trunks. Plants continuously lose water by evapotranspiration , but water loss
1748-417: Is a species of pine in the family Pinaceae . It occurs in mountain ranges of northwestern North America and is the state tree of Idaho . Western white pine is a large tree, regularly growing to 30–50 metres (98–164 ft) tall. It is a member of the white pine group, Pinus subgenus Strobus , and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with
1824-448: Is also the potential for contamination of water and soil. At a global level, human practices have made the impacts of wildfire worse, with a doubling in land area burned by wildfires compared to natural levels. Humans have impacted wildfire through climate change (e.g. more intense heat waves and droughts ), land-use change , and wildfire suppression . The carbon released from wildfires can add to carbon dioxide concentrations in
1900-728: Is no longer an expectation, but the majority of wildfires are often extinguished before they grow out of control. While more than 99% of the 10,000 new wildfires each year are contained, escaped wildfires under extreme weather conditions are difficult to suppress without a change in the weather. Wildfires in Canada and the US burn an average of 54,500 square kilometers (13,000,000 acres) per year. Above all, fighting wildfires can become deadly. A wildfire's burning front may also change direction unexpectedly and jump across fire breaks. Intense heat and smoke can lead to disorientation and loss of appreciation of
1976-473: Is prone to offset errors, anywhere from 2 to 3 kilometers (1 to 2 mi) for MODIS and AVHRR data and up to 12 kilometers (7.5 mi) for GOES data. Satellites in geostationary orbits may become disabled, and satellites in polar orbits are often limited by their short window of observation time. Cloud cover and image resolution may also limit the effectiveness of satellite imagery. Global Forest Watch provides detailed daily updates on fire alerts. In 2015
2052-416: Is usually balanced by water absorbed from the soil, humidity, or rain. When this balance is not maintained, often as a consequence of droughts , plants dry out and are therefore more flammable. A wildfire front is the portion sustaining continuous flaming combustion, where unburned material meets active flames, or the smoldering transition between unburned and burned material. As the front approaches,
2128-692: The 2023 Canadian wildfires false claims of arson gained traction on social media; however, arson is generally not a main cause of wildfires in Canada. In California, generally 6–10% of wildfires annually are arson. Coal seam fires burn in the thousands around the world, such as those in Burning Mountain , New South Wales; Centralia , Pennsylvania; and several coal-sustained fires in China . They can also flare up unexpectedly and ignite nearby flammable material. (Fire) Good luck deleting this, Frost! (Fire) The spread of wildfires varies based on
2204-965: The Amazon rainforest . The fires in the latter were caused mainly by illegal logging . The smoke from the fires expanded on huge territory including major cities, dramatically reducing air quality. As of August 2020, the wildfires in that year were 13% worse than in 2019 due primarily to climate change , deforestation and agricultural burning. The Amazon rainforest 's existence is threatened by fires. Record-breaking wildfires in 2021 occurred in Turkey , Greece and Russia , thought to be linked to climate change. The carbon released from wildfires can add to greenhouse gas concentrations. Climate models do not yet fully reflect this feedback . Wildfires release large amounts of carbon dioxide, black and brown carbon particles, and ozone precursors such as volatile organic compounds and nitrogen oxides (NOx) into
2280-602: The Bitterroot , Cabinet , Clearwater , Coeur d'Alene , Flathead , Kaniksu , Kootenai , Lewis and Clark , Lolo , and St. Joe national forests . The fire burned over two days on the weekend of August 20–21, after strong winds caused numerous smaller fires to combine into a firestorm of unprecedented size. It killed 87 people, mostly firefighters, destroyed numerous manmade structures, including several entire towns, and burned more than three million acres of forest with an estimated billion dollars' worth of timber lost. While
2356-569: The European Union . In 2020, the carbon released by California's wildfires was significantly larger than the state's other carbon emissions. Forest fires in Indonesia in 1997 were estimated to have released between 0.81 and 2.57 giga tonnes (0.89 and 2.83 billion short tons ) of CO 2 into the atmosphere, which is between 13–40% of the annual global carbon dioxide emissions from burning fossil fuels. In June and July 2019, fires in
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2432-480: The Fire Information for Resource Management System (FIRMS). Between 2022–2023, wildfires throughout North America prompted an uptake in the delivery and design of various technologies using artificial intelligence for early detection, prevention, and prediction of wildfires. Wildfire suppression depends on the technologies available in the area in which the wildfire occurs. In less developed nations
2508-504: The Paris climate agreement . Due to the complex oxidative chemistry occurring during the transport of wildfire smoke in the atmosphere, the toxicity of emissions was indicated to increase over time. Atmospheric models suggest that these concentrations of sooty particles could increase absorption of incoming solar radiation during winter months by as much as 15%. The Amazon is estimated to hold around 90 billion tons of carbon. As of 2019,
2584-410: The dry season . In middle latitudes , the most common human causes of wildfires are equipment generating sparks (chainsaws, grinders, mowers, etc.), overhead power lines , and arson . Arson may account for over 20% of human caused fires. However, in the 2019–20 Australian bushfire season "an independent study found online bots and trolls exaggerating the role of arson in the fires." In
2660-463: The Arctic emitted more than 140 megatons of carbon dioxide, according to an analysis by CAMS. To put that into perspective this amounts to the same amount of carbon emitted by 36 million cars in a year. The recent wildfires and their massive CO 2 emissions mean that it will be important to take them into consideration when implementing measures for reaching greenhouse gas reduction targets accorded with
2736-601: The Forest Service, doubled down following the Big Blow Up, calling for a more aggressive fire prevention policy. He launched a campaign to remove fire from the landscape. His efforts would lead to the creation of the Weeks Act , which called for cooperation among federal, state and private agencies to address fire protection. The Weeks Act has been credited with saving nearly 20 million acres of forestland. One of
2812-442: The United States in the early 20th century and fires were reported using telephones, carrier pigeons , and heliographs . Aerial and land photography using instant cameras were used in the 1950s until infrared scanning was developed for fire detection in the 1960s. However, information analysis and delivery was often delayed by limitations in communication technology. Early satellite-derived fire analyses were hand-drawn on maps at
2888-779: The Western US, earlier snowmelt and associated warming has also been associated with an increase in length and severity of the wildfire season, or the most fire-prone time of the year. A 2019 study indicates that the increase in fire risk in California may be partially attributable to human-induced climate change . In the summer of 1974–1975 (southern hemisphere), Australia suffered its worst recorded wildfire, when 15% of Australia's land mass suffered "extensive fire damage". Fires that summer burned up an estimated 117 million hectares (290 million acres ; 1,170,000 square kilometres ; 450,000 square miles ). In Australia,
2964-621: The Western white pines have been killed by the blister rust west of the Cascades. Large stands have been succeeded by other pines or non-pine species. The rust has also killed much of the whitebark pine outside of California . Blister rust is less severe in California, and Western white and whitebark pines have survived there in great numbers. Resistance to the blister rust is genetic; due to Western white pine's genetic variability, some individuals are relatively unaffected. The Forest Service has
3040-435: The air over roads, rivers, and other barriers that may otherwise act as firebreaks . Torching and fires in tree canopies encourage spotting, and dry ground fuels around a wildfire are especially vulnerable to ignition from firebrands. Spotting can create spot fires as hot embers and firebrands ignite fuels downwind from the fire. In Australian bushfires , spot fires are known to occur as far as 20 kilometres (12 mi) from
3116-732: The annual number of hot days (above 35 °C) and very hot days (above 40 °C) has increased significantly in many areas of the country since 1950. The country has always had bushfires but in 2019, the extent and ferocity of these fires increased dramatically. For the first time catastrophic bushfire conditions were declared for Greater Sydney. New South Wales and Queensland declared a state of emergency but fires were also burning in South Australia and Western Australia. In 2019, extreme heat and dryness caused massive wildfires in Siberia , Alaska , Canary Islands , Australia , and in
Great Fire of 1910 - Misplaced Pages Continue
3192-470: The atmosphere and thus contribute to the greenhouse effect . This creates a climate change feedback . Naturally occurring wildfires can have beneficial effects on those ecosystems that have evolved with fire. In fact, many plant species depend on the effects of fire for growth and reproduction. The ignition of a fire takes place through either natural causes or human activity (deliberate or not). Natural occurrences that can ignite wildfires without
3268-444: The atmosphere. These emissions affect radiation, clouds, and climate on regional and even global scales. Wildfires also emit substantial amounts of semi-volatile organic species that can partition from the gas phase to form secondary organic aerosol (SOA) over hours to days after emission. In addition, the formation of the other pollutants as the air is transported can lead to harmful exposures for populations in regions far away from
3344-459: The best way to handle forest fires—whether to let them burn because they were a part of nature and were expensive to fight, or to fight them in order to protect the forests. The Forest Service had instituted a policy of extinguishing all fires as quickly as possible in 1908. That strategy was called into question after the Great Fire, but Fire Chief Henry Graves , the second Chief Forester for
3420-504: The deadliest, forest fire in U.S. history. In the aftermath of the fire, the U.S. Forest Service received considerable recognition for its firefighting efforts, including a doubling of its budget from Congress. The outcome was to highlight firefighters as public heroes while raising public awareness of national nature conservation. The fire is often considered a significant impetus in the development of early wildfire prevention and suppression strategies . A number of factors contributed to
3496-718: The destruction caused by the Great Fire of 1910. The wildfire season started early that year because the winter of 1909–1910 and the spring and summer of 1910 were extremely dry, and the summer sufficiently hot to have been described as "like no others." The drought resulted in forests with abundant dry fuel, in an area which had previously experienced dependable autumn and winter moisture. Hundreds of fires were ignited by hot cinders flung from locomotives, sparks, lightning, and backfiring crews. By mid-August, there were 1,000 to 3,000 individual fires burning in Idaho, Montana, and Washington. August 20 (Saturday) brought hurricane-force winds to
3572-701: The direction of the fire, which can make fires particularly dangerous. For example, during the 1949 Mann Gulch fire in Montana , United States, thirteen smokejumpers died when they lost their communication links, became disoriented, and were overtaken by the fire. In the Australian February 2009 Victorian bushfires , at least 173 people died and over 2,029 homes and 3,500 structures were lost when they became engulfed by wildfire. Western white pine Western white pine ( Pinus monticola ), also called silver pine and California mountain pine ,
3648-697: The earth's atmosphere has 415 parts per million of carbon, and the destruction of the Amazon would add about 38 parts per million. Some research has shown wildfire smoke can have a cooling effect. Research in 2007 stated that black carbon in snow changed temperature three times more than atmospheric carbon dioxide. As much as 94 percent of Arctic warming may be caused by dark carbon on snow that initiates melting. The dark carbon comes from fossil fuels burning, wood and other biofuels, and forest fires. Melting can occur even at low concentrations of dark carbon (below five parts per billion)". Wildfire prevention refers to
3724-411: The economic and safety benefits of protecting structures and human life. The demand for timely, high-quality fire information has increased in recent years. Fast and effective detection is a key factor in wildfire fighting. Early detection efforts were focused on early response, accurate results in both daytime and nighttime, and the ability to prioritize fire danger. Fire lookout towers were used in
3800-541: The exact cause of the fire is often debated, according to various U.S. Forest Service sources, the primary cause of the Big Burn was a combination of severe drought and a series of lightning storms that ignited hundreds of small fires across the Northern Rockies . However, the ignition sources also include human activity such as railroads, homesteaders, and loggers. It is believed to be the largest, although not
3876-468: The fire from smoke damage to their lungs. The entire 28-man "Lost Crew" was overcome by flames and perished on Setzer Creek outside of Avery, Idaho . It remains the second deadliest incident in the history of firefighting in the United States, only being surpassed by the September 11 attacks . Perhaps the most famous story of survival is that of Ranger Ed Pulaski , a U.S. Forest Service ranger who led
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#17327943752903952-402: The fire front. Especially large wildfires may affect air currents in their immediate vicinities by the stack effect : air rises as it is heated, and large wildfires create powerful updrafts that will draw in new, cooler air from surrounding areas in thermal columns . Great vertical differences in temperature and humidity encourage pyrocumulus clouds , strong winds, and fire whirls with
4028-417: The fire heats both the surrounding air and woody material through convection and thermal radiation . First, wood is dried as water is vaporized at a temperature of 100 °C (212 °F). Next, the pyrolysis of wood at 230 °C (450 °F) releases flammable gases. Finally, wood can smolder at 380 °C (720 °F) or, when heated sufficiently, ignite at 590 °C (1,000 °F). Even before
4104-535: The fires burning in the northern Rockies. The arrival of the Buffalo Soldiers troops almost doubled the black population of Idaho. Smoke from the fire was said to have been seen as far east as Watertown, New York , and as far south as Denver, Colorado . It was reported that, at night, five hundred miles (800 km) out into the Pacific Ocean, ships could not navigate by the stars because the sky
4180-532: The first person who tried to leave. In the end, all but five of the forty or so men survived. Pulaski has since been widely celebrated as a hero for his efforts; the mine tunnel in which he and his crew sheltered from the fire, now known as the Pulaski Tunnel , is listed on the National Register of Historic Places . Several towns were completely destroyed by the fire: In Idaho, one third of
4256-452: The flames of a wildfire arrive at a particular location, heat transfer from the wildfire front warms the air to 800 °C (1,470 °F), which pre-heats and dries flammable materials, causing materials to ignite faster and allowing the fire to spread faster. High-temperature and long-duration surface wildfires may encourage flashover or torching : the drying of tree canopies and their subsequent ignition from below. Wildfires have
4332-421: The flammable material present, its vertical arrangement and moisture content, and weather conditions. Fuel arrangement and density is governed in part by topography , as land shape determines factors such as available sunlight and water for plant growth. Overall, fire types can be generally characterized by their fuels as follows: Wildfires occur when all the necessary elements of a fire triangle come together in
4408-441: The force of tornadoes at speeds of more than 80 kilometres per hour (50 mph). Rapid rates of spread, prolific crowning or spotting, the presence of fire whirls, and strong convection columns signify extreme conditions. Intensity also increases during daytime hours. Burn rates of smoldering logs are up to five times greater during the day due to lower humidity, increased temperatures, and increased wind speeds. Sunlight warms
4484-454: The ground during the day which creates air currents that travel uphill. At night the land cools, creating air currents that travel downhill. Wildfires are fanned by these winds and often follow the air currents over hills and through valleys. Fires in Europe occur frequently during the hours of 12:00 p.m. and 2:00 p.m. Wildfire suppression operations in the United States revolve around
4560-495: The infrared signature of carbon dioxide produced by fires. Additional capabilities such as night vision , brightness detection, and color change detection may also be incorporated into sensor arrays . The Department of Natural Resources signed a contract with PanoAI for the installation of 360 degree 'rapid detection' cameras around the Pacific northwest, which are mounted on cell towers and are capable of 24/7 monitoring of
4636-482: The interior northwest, whipping the hundreds of small fires into one or two much larger blazing infernos. Such a conflagration was impossible to fight; there were too few men and supplies. The United States Forest Service (then called the National Forest Service) was only five years old at the time and unprepared for the possibilities of the dry summer or a fire of this magnitude, although throughout
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#17327943752904712-477: The involvement of humans include lightning , volcanic eruptions , sparks from rock falls, and spontaneous combustions . Sources of human-caused fire may include arson, accidental ignition, or the uncontrolled use of fire in land-clearing and agriculture such as the slash-and-burn farming in Southeast Asia. In the tropics , farmers often practice the slash-and-burn method of clearing fields during
4788-566: The people who fought the fire, Ferdinand Silcox , went on to become the fifth chief of the Forest Service. Influenced by the devastation of the Big Blowup, Silcox promoted the "10 a.m." policy, with the goal of suppressing all fires by 10 a.m. of the day following their report. It was decided that the Forest Service was to prevent and battle every wildfire. 47°18′N 116°00′W / 47.3°N 116°W / 47.3; -116 Wildfire A wildfire , forest fire , or
4864-484: The preemptive methods aimed at reducing the risk of fires as well as lessening its severity and spread. Prevention techniques aim to manage air quality, maintain ecological balances, protect resources, and to affect future fires. Prevention policies must consider the role that humans play in wildfires, since, for example, 95% of forest fires in Europe are related to human involvement. Wildfire prevention programs around
4940-404: The risk and alter the behavior of wildfires dramatically. Years of high precipitation can produce rapid vegetation growth, which when followed by warmer periods can encourage more widespread fires and longer fire seasons. High temperatures dry out the fuel loads and make them more flammable, increasing tree mortality and posing significant risks to global forest health. Since the mid-1980s, in
5016-565: The summer it had been urgently recruiting as many men as possible to fight the hundreds of fires already burning, many of them with little forestry or firefighting experience. Earlier in August, President William Howard Taft had authorized the addition of military troops to the effort, and 4,000 troops, including seven companies from the U.S. Army 's 25th Infantry Regiment (known as the Buffalo Soldiers ), were brought in to help fight
5092-399: The techniques used can be as simple as throwing sand or beating the fire with sticks or palm fronds. In more advanced nations, the suppression methods vary due to increased technological capacity. Silver iodide can be used to encourage snow fall, while fire retardants and water can be dropped onto fires by unmanned aerial vehicles , planes , and helicopters . Complete fire suppression
5168-461: The town of Wallace was burned to the ground, with an estimated $ 1 million in damage (equivalent to $ 31,490,000 in 2023). Passenger trains evacuated thousands of Wallace residents to Spokane and Missoula . Another train with 1,000 people from Avery took refuge in a tunnel after racing across a burning trestle. Other towns with severe damage included Burke , Kellogg , Murray, and Osburn , all in Idaho. The towns of Avery, Saltese (MT), as well as
5244-936: The use of planes, helicopter, or UAVs can provide a wider view and may be sufficient to monitor very large, low risk areas. These more sophisticated systems employ GPS and aircraft-mounted infrared or high-resolution visible cameras to identify and target wildfires. Satellite-mounted sensors such as Envisat 's Advanced Along Track Scanning Radiometer and European Remote-Sensing Satellite 's Along-Track Scanning Radiometer can measure infrared radiation emitted by fires, identifying hot spots greater than 39 °C (102 °F). The National Oceanic and Atmospheric Administration 's Hazard Mapping System combines remote-sensing data from satellite sources such as Geostationary Operational Environmental Satellite (GOES), Moderate-Resolution Imaging Spectroradiometer (MODIS), and Advanced Very High Resolution Radiometer (AVHRR) for detection of fire and smoke plume locations. However, satellite detection
5320-581: The western face of the Sierra Nevada as far south as the headwaters of the Kern River . The tree often occurs in forests with fir and hemlock species, especially those which are tolerant of shade . It benefits from disturbances that clear away competing species, including low fires that do not destroy all of its cone-protected seeds. It is also well adapted to poor, rocky soils. Once abundant in northern Idaho, Western white pine's population
5396-411: The wildfires. While direct emissions of harmful pollutants can affect first responders and residents, wildfire smoke can also be transported over long distances and impact air quality across local, regional, and global scales. The health effects of wildfire smoke, such as worsening cardiovascular and respiratory conditions, extend beyond immediate exposure, contributing to nearly 16,000 annual deaths,
5472-519: The world may employ techniques such as wildland fire use (WFU) and prescribed or controlled burns . Wildland fire use refers to any fire of natural causes that is monitored but allowed to burn. Controlled burns are fires ignited by government agencies under less dangerous weather conditions. Other objectives can include maintenance of healthy forests, rangelands, and wetlands, and support of ecosystem diversity. Strategies for wildfire prevention, detection, control and suppression have varied over
5548-466: The years. One common and inexpensive technique to reduce the risk of uncontrolled wildfires is controlled burning : intentionally igniting smaller less-intense fires to minimize the amount of flammable material available for a potential wildfire. Vegetation may be burned periodically to limit the accumulation of plants and other debris that may serve as fuel, while also maintaining high species diversity. While other people claim that controlled burns and
5624-454: Was cloudy with smoke. The extreme scorching heat of the sudden inferno has been attributed to the expansive Western white pine forests that covered much of northern Idaho at the time, due to their flammable sap. The fire was finally extinguished when another cold front swept in, bringing steady rain and some early snowfall. At least 78 firefighters were killed while trying to control the fire, not including those firefighters who died after
5700-435: Was drastically affected from the late 19th century to the late 20th century by logging, wildfires, white pine blister rust , and a bark beetle epidemic. Since 1970, millions of Western white pine seedlings have been planted to make up for the losses. The white pine blister rust ( Cronartium ribicola ) is a fungus that was accidentally introduced from Europe in 1909. The United States Forest Service estimates that 90% of
5776-794: Was organized in South Africa's Kruger National Park to validate fire detection products including the new VIIRS active fire data. In advance of that campaign, the Meraka Institute of the Council for Scientific and Industrial Research in Pretoria, South Africa, an early adopter of the VIIRS 375 m fire product, put it to use during several large wildfires in Kruger. Since 2021 NASA has provided active fire locations in near real-time via
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