A disaster is a serious problem that happens over a period of time and causes harm to people, things, economies, or the environment that the affected community or society cannot handle it on its own. In theory, natural disasters are those caused by natural hazards, whereas human-made disasters are those caused by human hazards. However, in modern times, the divide between natural, human-made or human-accelerated disasters is more and more difficult to draw. In fact, all disasters can be seen as human-made, due to human failure to introduce appropriate emergency management measures.
A natural disaster is the highly harmful impact on a society or community following a natural hazard event. Examples of natural hazard events include floods, droughts, earthquakes, tropical cyclones, volcanic activity, wildfires. A natural disaster can cause loss of life or damage property, and typically leaves economic damage in its wake. The severity of the damage depends on the population's disaster preparedness and on the existing infrastructure. Scholars have been saying that the term natural disaster is unsuitable and should be abandoned. Instead, the simpler term disaster could be used, while also specifying the category of hazard. A disaster is a result of a natural or human-made hazard impacting a vulnerable community. It is the combination of the hazard along with exposure of a vulnerable society that results in a disaster.
Urban seismic risk is the risk of earthquakes damaging or destroying people and things in towns and cities. Even if a big earthquake is likely urban seismic risk can be minimized with good earthquake construction, and seismic analysis. One of the best ways to deal with the issue is through an earthquake scenario analysis. Earthquake engineering can reduce the risk.
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With better understanding of seismic demand on structures and with recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged. Prior to the introduction of modern seismic codes in the late 1960s for developed countries and late 1970s for many other parts of the world, many structures were designed without adequate detailing and reinforcement for seismic protection. In view of the imminent problem, various research work has been carried out. State-of-the-art technical guidelines for seismic assessment, retrofit and rehabilitation have been published around the world – such as the ASCE-SEI 41 and the New Zealand Society for Earthquake Engineering (NZSEE)'s guidelines. These codes must be regularly updated; the 1994 Northridge earthquake brought to light the brittleness of welded steel frames, for example.
A humanitarian crisis is defined as a singular event or a series of events that are threatening in terms of health, safety or well-being of a community or large group of people. It may be an internal or external conflict and usually occurs throughout a large land area. Local, national and international responses are necessary in such events.
The World Conference on Disaster Risk Reduction is a series of United Nations conferences focusing on disaster and climate risk management in the context of sustainable development. The World Conference has been convened three times, with each edition to date having been hosted by Japan: in Yokohama in 1994, in Hyogo in 2005 and in Sendai in 2015. As requested by the UN General Assembly, the United Nations Office for Disaster Risk Reduction (UNDRR) served as the coordinating body for the Second and Third UN World Conference on Disaster Reduction in 2005 and 2015.
"Emergency management" or "disaster management" is a science and a system charged with creating the framework within which communities reduce vulnerability to hazards and cope with disasters. Emergency management, despite its name, does not actually focus on the management of emergencies, which can be understood as minor events with limited impacts and are managed through the day-to-day functions of a community. Instead, emergency management focuses on the management of disasters, which are events that produce more impacts than a community can handle on its own. The management of disasters tends to require some combination of activity from individuals and households, organizations, local, and/or higher levels of government. Although many different terminologies exist globally, the activities of emergency management can be generally categorized into preparedness, response, mitigation, and recovery, although other terms such as disaster risk reduction and prevention are also common. The outcome of emergency management is to prevent disasters and where this is not possible, to reduce their harmful impacts.
Earthquake engineering is an interdisciplinary branch of engineering that designs and analyzes structures, such as buildings and bridges, with earthquakes in mind. Its overall goal is to make such structures more resistant to earthquakes. An earthquake engineer aims to construct structures that will not be damaged in minor shaking and will avoid serious damage or collapse in a major earthquake. A properly engineered structure does not necessarily have to be extremely strong or expensive. It has to be properly designed to withstand the seismic effects while sustaining an acceptable level of damage.
Disaster risk reduction (DRR) is an approach for planning and taking steps to make disasters less likely to happen, and less damaging when they do happen. DRR aims to make communities stronger and better prepared to handle disasters. When DRR is successful, it decreases the vulnerability of communities because it mitigates the effects of disasters. This means DRR can reduce the severity and number of risky events. Since climate change can increase climate hazards, DRR and climate change adaptation are often looked at together in development efforts.
Flood control methods are used to reduce or prevent the detrimental effects of flood waters. Flooding can be caused by a mix of both natural processes, such as extreme weather upstream, and human changes to waterbodies and runoff. Flood control methods can be either of the structural type and of the non-structural type. Structural methods hold back floodwaters physically, while non-structural methods do not. Building hard infrastructure to prevent flooding, such as flood walls, is effective at managing flooding. However, best practice within landscape engineering is more and more to rely on soft infrastructure and natural systems, such as marshes and flood plains, for handling the increase in water.
The Global Earthquake Model (GEM) is a public–private partnership initiated in 2006 by the Global Science Forum of the OECD to develop global, open-source risk assessment software and tools. With committed backing from academia, governments and industry, GEM contributes to achieving profound, lasting reductions in earthquake risk worldwide by following the priorities of the Hyogo Framework for Action. From 2009 to 2013 GEM is constructing its first working global earthquake model and will provide an authoritative standard for calculating and communicating earthquake risk worldwide.
A hazard is a potential source of harm. Substances, events, or circumstances can constitute hazards when their nature would potentially allow them to cause damage to health, life, property, or any other interest of value. The probability of that harm being realized in a specific incident, combined with the magnitude of potential harm, make up its risk. This term is often used synonymously in colloquial speech.
The Emergency Capacity Building Project is a collaborative capacity-building project aimed at improving the speed, effectiveness and delivery of humanitarian response programs. The ECB Project is a partnership between seven non-governmental organizations (NGOs), and implements programs in one region and four countries known as consortia.
The United Nations Office for Disaster Risk Reduction (UNDRR) was created in December 1999 to ensure the implementation of the International Strategy for Disaster Reduction.
Disaster preparedness in museums, galleries, libraries, archives and private collections, involves any actions taken to plan for, prevent, respond or recover from natural disasters and other events that can cause damage or loss to cultural property. 'Disasters' in this context may include large-scale natural events such as earthquakes, flooding or bushfire, as well as human-caused events such as theft and vandalism. Increasingly, anthropogenic climate change is a factor in cultural heritage disaster planning, due to rising sea levels, changes in rainfall patterns, warming average temperatures, and more frequent extreme weather events.
Anand Swarup Arya (1931-2019) was an Indian structural engineer, known for his expertise in the soil and foundation engineering and earthquake disaster management. He is a former chairman of the Bureau of Indian Standards (BIS) Committee on Earthquake Engineering and a recipient of the United Nations Sasakawa Disaster Prevention Award of 1997. The Government of India awarded him the fourth highest civilian honour of the Padma Shri in 2002.
Robert Glasser is the former Special Representative of the Secretary-General for Disaster Risk Reduction, and head of the United Nations International Strategy for Disaster Reduction. Australian national Glasser was nominated in November 2015 by Secretary-General of the United Nations Ban Ki-moon to succeed Margareta Wahlström of Sweden, who was the first such Special Representative and had been appointed in November 2008. Glasser took up his post in January 2016. He was succeeded on 1 March 2018 by Mami Mizutori.
Vertical and horizontal evacuation are strategies for providing safety to humans in case of tsunami, hurricane or other natural disaster.
Praveensingh Pratapsingh Pardeshi is an Indian Administrative Service (IAS) officer with over 29 years of experience in the services, and former Municipal Commissioner of Mumbai. Pardeshi has held various senior leadership positions within the United Nations as the Chief of Transition Recovery unit, UNDP Geneva and Senior Coordinator of United Nations International Strategy for Disaster Reduction (UNISDR). He has subsequently headed the regional offices Support and Co-ordination Unit of UNISDR. Pardeshi has been a key player in post-disaster and conflict recovery programs of UNDP and the public administration, governance reform, wildlife conservation and public health effort against COVID-19 in Maharashtra, India. Pardeshi was the Global Programme Coordinator for the Defeat-NCD Partnership within United Nations Institute of Training and Research (UNITAR).
Building Back Better, or more frequently termed Build Back Better (BBB), is a strategy aimed at reducing the risk to the people of nations and communities in the wake of future disasters and shocks. It is a conceptual strategy that has continued to evolve since its origination in May 2005. However, what continues is the overall goal of enabling countries and communities to be stronger and more resilient following a disaster by reducing vulnerability to future disasters. Building resilience entails addressing physical, social, environmental, and economic vulnerabilities and shocks.
