User:Owain.davies/Emergency


 * For other uses of Emergency, please see Emergency (disambiguation).

An Emergency is a situation which poses an immediate risk to life, health, property or environment. Most emergencies require urgent intervention to prevent a worsening of the situation, in order to start rectifying the problem or in some instances to simply offer palliative care for the aftermath.

Whilst some emergencies are self evident (such as a natural disaster which threatens many lives), many smaller incidents require the subjective opinion of an observer (or affected party) in order to decide whether it qualifies as an emergency.

Defining an Emergency
In order to be defined as an emergency, the incident should be one of the following:
 * Immediately threatening to life, health, property or environment.
 * Have already caused loss of life, health detriments, property damage or environmental damage
 * Have a high probability of escalating to cause immediate danger to life, health, property or environment

Whilst most emergency services agree on protecting human life, health and property, the environmental impacts are not considered sufficiently important by some agencies. This also extends to areas such as animal welfare, where some emergency organisations cover this element through the 'property' definition, where animals which are owned by a person are threatened (although this does not cover wild animals). This means that some agencies will not mount an 'emergency' response where it endangers wild animals or environment, although others will respond to such incidents (such as oil spills at sea which pose a threat to marine life). The attitude of the agencies involved is likely to reflect the predominant opinion of the government of the area.

Causing danger to life
Many emergencies cause an immediate danger to the life of people involved. This can range from emergencies affecting a single person, such as the entire range of medical emergencies which include heart attacks, strokes and trauma, to incidents affecting large numbers of people such as natural disasters including hurricanes, floods or mudslides.

Most agencies consider these to be the highest priority of emergency, which follows the general school of thought that nothing is more important than human life.

Causing danger to health
Some emergencies are not immediately threatening to life, but might have serious implications for the continued health and wellbeing of a person or persons (although a health emergency can subsequently escalate to be threatening to life).

The causes of a 'health' emergency are often very similar to the causes of an emergency threatening to life, which includes medical emergencies and natural disasters, although the range of incidents which can be categorised here is far greater than those which cause a danger to life (such as broken limbs, which do not usually cause death, but immediate intervention is required if the person is to recover properly)

Causing danger to property
Other emergencies do not threaten any people, but do threaten peoples' property. An example of this would be a fire in a warehouse which has been evacuated. The situation is treated as an emergency as the fire may spread to other buildings, or may cause sufficient damage to make the business unable to continue (affecting livelihood of the employees).

Many agencies categorise property emergency as the lowest priority, and may not take as many risks in dealing with it. For instance, firefighters are unlikely to enter a burning building which they know to be empty, as the risk is unjustified, whereas they are more likely to enter a building where people are reported as trapped.

Causing danger to the environment
Some emergencies do not immediately endanger life, health or property, but do affect the natural environment and creatures living within it. Not all agencies consider this to be a genuine emergency, but it can have far reaching effects on animals and the long term condition of the land. Examples would include forest fires and marine oil spills.

Systems of classifying emergencies
Agencies across the world have different systems for classifying incidents, but all of them serve to help them allocate finite resource, by prioritising between different emergencies.

The first stage in any classification is likely to be defining whether the incident qualifies as an emergency, and consequently if it warrants an emergency response. Some agencies may still respond to non-emergency calls, depending on their remit and availability of resource. An example of this would be a fire department responding to help retrieve a cat from a tree, where no life, health or property is immediately at risk.

Following this, many agencies assign a sub-classification to the emergency, prioritising incidents which have the most potential for risk to life, health or property (in that order). For instance, many ambulance services use a system called the Advanced Medical Priority Dispatch System (AMPDS) or a similar solution. The AMPDS categorises all calls to the ambulance service using it as either 'A' category (immediately life threatening), 'B' Category (immediately health threatening) or 'C' category (non-emergency call which still requires a response). Some services will now also have a fourth category, where they believe that no response is required after clinical questions are asked.

Other systems (especially as regards major incidents) use objective measures to direct resource. Two such systems are CHALET and ETHANE, which are both mnemonics to help emergency services staff classify incidents, and direct resource. Each of these acronyms helps ascertain the number of casualties (usually including the number of dead and number of non-injured people involved), how the incident has occurred, and what emergency services are required.

Agencies involved in dealing with emergencies

 * Main article: Emergency service

Most developed countries have a number of emergency services operating within them, whose purpose is to provide assistance in dealing with any emergency which may occur. They are often government operated, paid for from tax revenue as a public service, but in some cases, they may be private companies, responding to emergencies in return for payment, or they may be voluntary organisations, providing the assistance from funds raised from donations.

Most developed countries operate three core emergency services which are:
 * Police, who deal with security of person and property, which can cover all three categories of emergency. They may also deal with punishment of those who cause an emergency through their actions.
 * Fire service, who deal with potentially harmful fires, but also often rescue operations such as dealing with road traffic collisions. Their actions help to prevent loss of life, damage to health and damage to or loss of property.
 * Emergency medical service, who just deal with potential loss of life or damage to health. Their concern with medical emergencies means that they are often required alongside the other emergency services to mitigate the effects of these risks.

In some countries or regions, two or more of these services may be provided by the same agency (e.g. the fire service providing emergency medical cover), and under different conditions (e.g. publicly funded fire service and police, but a private ambulance service)

There may also be a number of secondary emergency services, which may be a part of one of the core agencies, or may be separate entities who assist the main agencies. This can include services providing specialist rescue (such as mountain rescue or mine rescue), bomb disposal or search and rescue teams.

Summoning Emergency services
Most countries have an emergency telephone number, also known as the universal emergency number, which can be used to summon the emergency services to any incident. This number varies from country to country (and in some cases by region within a country), but in most cases, they are in a short number format, such as 999 (United Kingdom), 112 (Europe) and 911 (United States).

Modern GSM mobile phones are often equipped with the facility, when roaming, to summon the local emergency services when you type the number familiar to where the phone was issued (for instance, dialling 911 on a US issued handset, would automatically connect you to 112 when travelling in France). The majority of mobile phones will also dial the emergency services, even if the phone keyboard is locked, or if the phone has an expired or missing SIM card.

Civil emergency services
In addition to those services provided specifically for emergencies, there may be a number of agencies who provide an emergency service as an incidental part of their normal 'day job' provision. This can include public utility workers, such as in provision of electricity or gas, who may be required to respond quickly, as both utilities have a large potential to cause danger to life, health and property if there is an infrastructure failure.

Emergency action principles (EAP)

 * ''Main Article: Emergency action principles

Emergency action principles are the key 'rules' which guide the actions of rescuers and potential rescuers. Because of the inherent nature of emergencies, no two are likely to be the same, so emergency action principles help to guide rescuers at incidents, by sticking to some basic tenets.

The adherence to (and contents of) the principles by would be rescuers varies widely based on the training the people involved in emergency have received, the support available from emergency services (and the time it will take to arrive) and the emergency itself.

Key emergency principle
The key principle taught in almost all systems is that the rescuer, be they a lay person or a professional, should assess the situation for danger.

The reason that an assessment for danger is given such high priority is that it is core to emergency management that rescuers do not become secondary victims of any incident, as this creates a further emergency that must be dealt with.

A typical assessment for danger would involve observation of the surroundings, starting with the cause of the accident (e.g. a falling object) and expanding outwards to include any situational hazards (e.g. fast moving traffic) and history or secondary information given by witnesses, bystanders or the emergency services (e.g. an attacker still waiting nearby).

Once a primary danger assessment has been complete, this should not end the system of checking for danger, but should inform all other parts of the process.

If at any time the risk from any hazard poses a significant danger (as a factor of likelihood and seriousness) to the rescuer, they should consider whether they should approach the scene (or leave the scene if appropriate).

Personal emergencies
Some people undergo incidents which cause them to believe they are in an emergency situation. However, it does not pose a risk to their life, physical health or property. In some instances, people may feel that they are entitled to or deserve an emergency response from agencies they come in to contact with, which is a view that may or may not be shared by the agency.

Some of these cases may be genuine emergencies if they threaten the mental health and wellbeing of the person involved, but many agencies do not recognise this as valid. This is more likely to be dealt with by social services or a physician than by the traditional emergency service agencies.