Issues Associated With Catastrophic Coastal Storms
 
(Information drawn from Catastrophic Coastal Storms - Hazard Mitigation and Development Management,
D. Godschalk, D. Brower, T. Beatley, Duke University Press, Durham, NC, 1989)

    Coastal areas of the Atlantic and Gulf have experienced rapid growth within the past twenty-five years. This means that for many residents of these areas the scope of the damage possible from a catastrophic storms is not a reality. They have not experienced the effects of a nor'easter or hurricane which has caused extensive property damage and disruption of life-style in their community.

    With growing populations in coastal areas, local municipalities have come to understand that even with increased warning time before a storm strikes, evacuation can be a serious issue. How much time is needed to move the population to safety? Can the roads in the area support the projected traffic load? What emergency support is needed to ensure safety of the population should there not be sufficient warning time to make evacuation possible? What other crisis management plans need to be in place to deal with potential coastal hazards, such as if a tanker is grounded by a storm? Will fire, police and ambulance departments be able to function if a severe storm damages roads and utilities in the community?

    When considering these issues, should a community limit its population, curtail its growth, and err on the cautious side? Or is concern about these issues unfounded and not appropriate for a community to worry about in this day and age?

    Communities are looking at situations where "the policy challenge lies in striking the appropriate balance between coastal development and hazard mitigation, between economic growth and public safety" (Godschalk, 1989, p. 5)
 

    Natural disasters represent the intersection of two sets: nature and population. As the
population continues to grow, so does the area of intersection, leading to costlier and
deadlier disasters.

    To help communities analyze risk and prepare an action plan to deal with potential catastrophic hazards, FEMA has prepared FIRM maps which predict areas that would be flooded by different water-level rises. Upland areas can easily be flooded by rising water as shown in this illustration.

To help communities analyze risk and prepare an action plan to deal with potential catastrophic hazards, a natural hazard management model has been developed. .
(Godschalk, 1989, p. 18)  This model has four parts:

  1. Mitigation - This section outlines long term actions that are to be taken to prevent, avoid or reduce the impact of a natural hazard to people and property.
  2. Preparedness - This part of the plan deals with actions to be taken after a storm warning has been received, e.g., evacuation.
  3. Response - This addresses the question of post-storm emergency aid for the affected population.
  4. Recovery - This part of the plan deals with how to restore the community to normal after storm damage has been evaluated.
    While each of these components is important in the management of natural hazards, the first part, mitigation, is what is attracting the most attention at this time. It is now understood that hazard mitigation and development management are closely linked. If a locality sets limits on where people build houses and where businesses locate, a step has been taken to reduce the impact of a natural hazard on the community.

    Actions taken by communities and states varies depending on the local priorities. In some areas, housing and businesses that are centered in beach communities provide tax revenue that is needed by the larger community. It would be very difficult to limit construction in such localities, even if a natural hazard risk existed there. In other places, communities may have the discretion to build in more than one location and then choose to build where there is less probability of impact from a natural hazard.

    Community attitudes are influenced by several things, including how the local media expresses concern about potential risks. For example, if a storm is predicted to impact an area with extreme force, and by luck the wind turns and the storm goes elsewhere, the community may come to believe that there is not as much risk as "the alarmists" claim, and that mitigation actions are not needed. However, if a community has recently experienced the effects of a severe storm it is far more likely to create a hazard mitigation plan in order to be ready for the next big storm.

    Some actions that communities consider or include when preparing a mitigation action plan for coastal storm hazards include:

    Another strategy that is found to be important in the development of a crisis management plan is the education of community residents. An informed consumer, the voter who decides policy for the community, will be more likely to understand the need to plan for recovery from a catastrophic storm, and be more willing to make the hard choices needed to protect the community.

    In a survey of 403 coastal communities conducted in 1984 by David Godschalk and his associates (Godschalk, 1989, pp. 206-234, appendix), the impediments that appear to stand in the way of implementing and enforcing a mitigation management plan are:

    In the same survey, the following forces were found to support the implementation of a hazard mitigation plan:     The other components of a natural hazard management model (preparedness, response and recovery) are generally developed along with the mitigation plan. Once more, perceived need within the community is a very important factor in determining the completeness of the plan. Insurance companies play a very important role in influencing communities that wish to implement hazard management plans because they directly set the price of the policies that cover residents and business owners in the event of a catastrophic loss. Insurance companies are working with local municipalities to encourage sensible development of hazard prone areas.
(See Insurance.)
 
Extreme Event Impacts in The United States
 
Event Annual Mean 
Loss of 
Life (period)
Annual Mean 
Current $ 
Loss (period)
Recent extreme 
event, $ loss, 
deaths (date)
floods 96 ('86-'95) $2.4B ('84-'93) $20B ('93) 
156 ('76)
hurricanes 20 ('86-'95) $6.2B ('89-'95) $30B ('92) 
256 ('69)
winter storms 47 ('88-'95) >$1B (est.) $6B ('93) 
200+ ('93)
tornadoes 44 ('85-'95) $2.9B ('91-'94) $3.8B ('93) 
94 ('85)
extreme heat 384 ('79-'92) ? >$15B ('80) 
522 ('95)
extreme cold 770 ('68-'85) ? >$30B ('76-'77) 
?
lightning 175 ('40-'81) >$1B (est.) ?
hail - $2.3B (est.) $650M ('90)
Annual Averages >1500 >$15.8B
 

Conclusion:

    When all of the factors regarding catastrophic storms are considered, the complex issue of how to prepare for these storms becomes evident. A balance needs to be found between the geographic/meterologic realities of a community's location and the political/economic factors that allow the community to thrive. Storms will continue to happen. People will learn how to manage their coastlines in preparation for these occasional storms so that they can minimize the negative effects of these natural hazards.
 
 
 

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