SECTION 4: RISK ASSESSMENT
Table 4.45 – Hurricane Damage Classifications
Storm Category
Damage Level
Photo Example
Description of Damages
No real damage to building structures. Damage primarily to unanchored mobile homes, shrubbery, and trees. Also, some coastal flooding and minor pier damage. Some roofing material, door, and window damage. Considerable damage to vegetation, mobile homes, etc. Flooding damages piers and small craft in unprotected moorings may break their moorings. Some structural damage to small residences and utility buildings, with a minor amount of curtainwall failures. Mobile homes are destroyed. Flooding near the coast destroys smaller structures, with larger structures damaged by floating debris. Terrain may be flooded well inland. More extensive curtainwall failures with some complete roof structure failure on small residences. Major erosion of beach areas. Terrain may be flooded well inland. Complete roof failure on many residences and industrial buildings. Some complete building failures with small utility buildings blown over or away. Flooding causes major damage to lower floors of all structures near the shoreline. Massive evacuation of residential areas may be required.
1
MINIMAL
2
MODERATE
3
EXTENSIVE
4
EXTREME
5
CATASTROPHIC
Source: National Hurricane Center; Federal Emergency Management Agency
Hurricane Fran is illustrative of the potential impact of hurricanes on the Wake County planning area. In Wake County alone, Fran caused oved $900 million in residential and commercial property damage and at least one death. Additional losses included infrastructure damages and power outages. Impact: 3 – Critical Spatial Extent: 4 – Large Historical Occurrences According to the Office of Coastal Management’s Tropical Cyclone Storm Segments data, which is a subset of the International Best Track Archive for Climate Stewardship (IBTrACS) dataset, 28 hurricanes and tropical storms have passed within 50 miles of Wake County since 1900. These storms tracks are shown in Figure 4.16. The date, storm name, storm category, and maximum wind speed of each event are detailed in Table 4.46.
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
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