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→Vehicles: Reinstate brief description of requirements for a fire, and add methods and equipment
* Proximity firefighting is fighting fires in situations where the fire produces a very high level of heat, such as [[aircraft]] and some [[chemical]] fires. Proximity firefighting is not the same thing as structural firefighting and in some (but not all) cases takes place outdoors.
* Proximity firefighting is fighting fires in situations where the fire produces a very high level of heat, such as [[aircraft]] and some [[chemical]] fires. Proximity firefighting is not the same thing as structural firefighting and in some (but not all) cases takes place outdoors.
* Entry firefighting is a highly specialized form of firefighting involving the actual direct entry of firefighters into a fire with a very high level of heat. It is not the same thing as proximity firefighting, although it is used in many of the same situations (such as flammable liquid fires).
* Entry firefighting is a highly specialized form of firefighting involving the actual direct entry of firefighters into a fire with a very high level of heat. It is not the same thing as proximity firefighting, although it is used in many of the same situations (such as flammable liquid fires).
== Methods and equipment ==
Three elements necessary for a fire to burn: [[oxygen]], [[fuel]], and a source of heat.
Remove any one of the three and the fire can no longer burn. (See [[Fire#Physics of fire|Fire]].)
All firefighting tactics are based on removing one or more of the three elements in the fire triangle.
Fire fighting involves a range of methods and equipment for fighting fires, depending on the circumstances and availability.
'''Water:''' The standard method is to pour water onto the fire.
This reduces the heat, hopefully to the point that the fire can no longer burn.
However, water is not suitable for liquid fuel fires, because it is likely to spread the fuel and make the fire larger, nor for electrical fires, because of the risk of electric shock.
'''Foam:''' Foam is put onto fires fuelled by liquid fuel.
It works by preventing oxygen getting to the fire, but does not spread the fuel around.
'''Powder:''' Powder is used on electrical fires<!--I think; is this correct? -->, as it does not conduct electricity.
Like foam, it works by cutting off the oxygen supply to the fire.
'''Gas:''' Non-combustible gases are sometimes used in fire-suppression systems installed in buildings.
They work by being heavier than air, thus displacing the oxygen.
However, because the oxygen is displaced from the building, humans are unable to survive for long either, so gas systems are only used in special circumstances.
'''Fire beaters and rakes:''' Fire beaters and rakes are low-tech ways to fight small fire in [[scrub]].
They work by spreading the fire out, thus reducing the concentration of heat, and by removing the source of fuel from the fire.
'''Extinguishers:''' Fire extinguishers are canisters of water, foam, or powder which can be carried by one person to the fire.
They are of limited capacity, but can be used to stop a fire before it becomes large.
See the "Extinguishers" section below.
'''Vehicles:''' Various vehicles are used by fire fighters, including trucks which pump water from a nearby supply onto a fire, and tankers which carry water to the site of the fire when no local supply is available.
'''Fire breaks:''' For fires in forested areas, [[bulldozer]]s or other heavy equipment may be used to cut a clear path through the forest in front of an advancing fire, or such fire breaks may be permanently maintained in forested areas.
Fire breaks provide an area with little fuel content, for the purpose of the fire stopping when it reaches the break.
However, strong winds might carry sparks from the fire across the fire break to further forest on the other side.
Even so, it may slow down the fire enough for fire crews to cope with the rest.
'''Back-burning:''' Instead of constructing fire breaks, an area ahead of an advancing fire might be set alight and burnt in a controlled manner to remove the fuel from that area, thus impeding the advance of the main fire.
'''Aeroplanes:''' Both fixed and rotary-wing aeroplanes (helicopters) are used to drop water onto fires, particularly in areas difficult to reach on the ground.
==Vehicles==
==Vehicles==