Summary and Keywords
Planning systems are essentially a layer of guidance or legal requirements that sit atop plans of any type at any governmental level at or below the source of that guidance. In the case of natural hazard risk reduction, they involve rules or laws dealing with plans to reduce loss of life or property from such events. In much of the world, this is either unexplored territory or the frontier of public planning; very little of what exists in this realm predates the 1980s, although one can find earlier roots of the public discussion behind such systems.
That said, the evolution of such systems in 21st century has been fairly rapid, at least in those nations with the resources and technical capacity to pursue the subject. Driven largely by substantial increases in disaster losses and growing concern about worldwide impacts of climate change, research, technology, and lessons from practice have grown apace. However, that progress has been uneven and subject to inequities in resources and governmental capacity.
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