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II. SITUATION <br /> This section of the CEMP provides a description of the potential hazard <br /> considerations, geographic characteristics, demographics, economic profile and <br /> emergency management support facilities for Indian River County. Additionally, <br /> there are several planning assumptions that were considered in the planning <br /> process. For a complete vulnerability assessment, see the Indian River County <br /> Local Mitigation Strategy(State & FEMA approved on August 12, 2015 and adopted <br /> by Resolution #2015-078 by the Board of County Commissioners on July 7, 2015). <br /> Indian River County's LMS plan has been approved for a period of five (5) years <br /> and will expire on August 12, 2020. <br /> A. HAZARD IDENTIFICATION VULNERABILITY AND RISK <br /> Communities in Indian River County are vulnerable to three classifications of <br /> hazards: natural, technological, and societal as identified below. A complete <br /> analysis can be found in the county's Local Mitigation Strategy, as well as a <br /> chart depicting the hazard vulnerability by jurisdiction and population centers <br /> that can be found in Table 4.15 in Section 4, pages 84-85 of the county's <br /> Local Mitigation Strategy. <br /> 1. Natural Hazards <br /> a. Flood — Hazard Identification <br /> A flood is defined by the National Weather Service as any high <br /> flow, overflow, or inundation by water which causes or <br /> threatens damage. There are a number of flood types, such <br /> as: <br /> River Flood — Occurs when water levels rise over the top of <br /> river banks due to excessive rain from tropical systems making <br /> landfall, persistent thunderstorms over the same area for <br /> extended periods of time, combined rainfall and snowmelt, or <br /> an ice jam. <br /> Coastal Flood—The inundation of land areas along the coast <br /> causes by higher than average high tide and worsened by <br /> heavy rainfall and onshore winds (i.e., wind blowing landward <br /> from the ocean). <br /> Storm Surge — An abnormal rise in water level in coastal <br /> areas, over and above the regular astronomical tide, caused by <br /> forces generated from a severe storm's wind, waves, and low <br /> Indian River County Comprehensive Emergency Management Plan Basic Page 7 <br />