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The reasoning: definitions and framework
Disaster (WHO): any occurrence that causes damage, ecological disruption, loss of human life or deterioration of health and health services on a scale sufficient to warrant an extraordinary response from outside the affected community. Risk = hazard × exposure × vulnerability / capacity. Types: natural (geophysical: earthquakes, tsunamis; hydrometeorological: floods, cyclones, droughts, heat waves; biological: epidemics) and human‑made (industrial: Bhopal 1984; transport; conflict; CBRN).
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