Tumbleweed Fire, Los Angeles County 2021, Part 9

A firebreak or double track (also called a fire line, fuel break, fireroad and firetrail in Australia) is a gap in vegetation or other combustible material that acts as a barrier to slow or stop the progress of a bushfire or wildfire. A firebreak may occur naturally where there is a lack of vegetation or "

fuel A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy but ...

", such as a river, lake or canyon. Firebreaks may also be man-made, and many of these also serve as roads, such as a

logging Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks or skeleton cars. Logging is the beginning of a supply chain ...

road, four-wheel drive trail, secondary road, or a highway.

Overview

In the construction of a firebreak, the primary goal is to remove deadwood and undergrowth down to mineral soil. Various methods may be used to accomplish this initially and to maintain this condition. Ideally, the firebreak will be constructed and maintained according to the established practices of sustainable forestry and fire protection engineering, also known as best management practices (BMP). The general goals are to maximize the effectiveness of the firebreak at slowing the spread of wildfire, and, by using firebreaks of sufficient size and density, to reduce the ultimate size of wildfires. Additional goals are to maintain the ecology of the forest and to reduce the impact of wildfires on air pollution and the global climate, and to balance the

costs and benefits In production, research, retail, and accounting, a cost is the value of money that has been used up to produce something or deliver a service, and hence is not available for use anymore. In business, the cost may be one of acquisition, in which ...

of the various projects. These goals can be achieved through the use of appropriate operating practices, many of which can be potentially mutually beneficial to all. In many cases, it may be useful for firebreak upkeep to be maintained along with the harvesting of forestry products, such as lumber and

biomass Biomass is plant-based material used as a fuel for heat or electricity production. It can be in the form of wood, wood residues, energy crops, agricultural residues, and waste from industry, farms, and households. Some people use the terms bi ...

fuel, since the objectives are fundamentally related, in that the basic goals are to remove material from the forest. Furthermore, if done properly, the value of these products can significantly offset the cost of maintaining the firebreak. In addition, these commercial industries and

small business Small businesses are types of corporations, partnerships, or sole proprietorships which have fewer employees and/or less annual revenue than a regular-sized business or corporation. Businesses are defined as "small" in terms of being able to ap ...

es are helped by a reduction in the property damages caused by wildfires, and reduced risk of investment. The

material that is not suitable for

dimensioned lumber Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, wi ...

is suitable to make

woodchips Woodchips are small- to medium-sized pieces of wood formed by cutting or chipping larger pieces of wood such as trees, branches, logging residues, stumps, roots, and wood waste. Woodchips may be used as a biomass solid fuel and are raw material ...

for the paper industry and the energy industry. Larger trees are sometimes left in place within some types of firebreaks, to shade the forest floor and reduce the rate of

accumulation, and to enhance the landscaping in recreational and inhabited locations.

Prevalence

Forested areas often contain vast networks of firebreaks. Some

communities A community is a Level of analysis, social unit (a group of living things) with commonality such as place (geography), place, Norm (social), norms, religion, values, Convention (norm), customs, or Identity (social science), identity. Communiti ...

are also using firebreaks as part of their city planning

strategy Strategy (from Greek στρατηγία ''stratēgia'', "art of troop leader; office of general, command, generalship") is a general plan to achieve one or more long-term or overall goals under conditions of uncertainty. In the sense of the "art ...

. An example is the city of Revelstoke, British Columbia, including Firebreaks in their Community Wildfire Protection Plan.

Effectiveness

Depending on the environmental conditions, and the relative effectiveness of a given firebreak, firebreaks often have to be backed up with other firefighting efforts. Even then, it is still sometimes possible for fire to spread across a seemingly impenetrable divide. During the worst part of the fire season in southern California, strong Santa Ana winds were observed to blow carpets of burning embers across eight-lane freeways. During the

1988 fires File:1988 Events Collage.png, From left, clockwise: The oil platform Piper Alpha explodes and collapses in the North Sea, killing 165 workers; The USS Vincennes (CG-49) mistakenly shoots down Iran Air Flight 655; Australia celebrates its Australian ...

in Yellowstone National Park, hot embers managed to cross the

Lewis Canyon The Lewis River is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed May 4, 2011 tributary of the Snake River. The entire course of the river is located within the boundaries of Yellows ...

, a natural canyon up to a mile wide and 600 feet (180 m) deep. In Australia, firebreaks are less effective against eucalyptus forest fires, since intense fires in tinder-dry eucalyptus forest spread through flying embers, which can be carried by the winds to trigger new blazes several kilometres away. In 2019, goats deployed to graze the nearby flammable vegetation and create a firebreak helped save the

Ronald Reagan Presidential Library and Museum The Ronald Reagan Presidential Library is the repository of presidential records from the administration of Ronald Reagan, the 40th president of the United States, and the burial place of the president and first lady, Nancy Reagan. It is the larg ...

and Getty Museum from

California wildfires This is a partial and incomplete list of California wildfires. California has dry, windy, and often hot weather conditions from spring through late autumn that can produce moderate to severe wildfires. Pre-1800, when the area was much more for ...

History

Due to a lack of a standardized firefighting force at the time, the

Great Fire of London The Great Fire of London was a major conflagration that swept through central London from Sunday 2 September to Thursday 6 September 1666, gutting the medieval City of London inside the old Roman city wall, while also extending past the ...

in 1666 instead saw the Tower of London garrison using gunpowder and fire hooks in a widespread, ad-hoc firebreaking campaign across Central London. Historians believe this to have been one of the major contributing factors to the eventual defeat of the inferno. The world's most expensive firebreak was created when part of Van Ness Avenue in San Francisco was dynamited to stop the spread of fire resulting from the

1906 San Francisco earthquake At 05:12 Pacific Standard Time on Wednesday, April 18, 1906, the coast of Northern California was struck by a major earthquake with an estimated moment magnitude of 7.9 and a maximum Mercalli intensity of XI (''Extreme''). High-intensity sha ...

. Firefighting after an earthquake can be especially challenging, because an earthquake can cause water mains to rupture, resulting in a complete loss of water pressure. 2013-05-10 12 18 27 Freshly dug fire break along the Mount Misery Trail in Brendan T

2013-05-10 12 18 27 Freshly dug fire break along the Mount Misery Trail in Brendan T

References

External links