It was also determined that the coastal storm, erosion, and tsunami
hazards should be profiled together because the same communities in
the County have the potential to be affected by all three hazards. In
the development of the initial plan, the HMWG indicated that based on
the fact that the majority of the development in San Diego is
relatively recent (within the last 60 years), an urban type of fire
that destroys multiple city blocks is not likely to occur alone,
without a wildfire in the urban/wild-land interface occurring first.
Therefore, it was determined that house/building fire and wildfire
should be addressed as one hazard category in the plan. This current
revised plan continues to discuss structure fire and wildfire
together. Similarly, the original plan and first revision addressed
earthquake and liquefaction as one category because liquefaction does
not occur unless an adequate level of ground shaking from an
earthquake occurs first. With the decommissioning of the San Onofre
Nuclear Generating Station it was decided to incorporate nuclear
materials release (resulting from an accident) under hazardous
materials release.
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