SECTION 4: RISK ASSESSMENT
To supplement the IRISK assessment of property at risk from hurricane, the planning team also evaluated hurricane risk using FEMA’s Hazus software, which estimates losses due to wind -related damage. Per this analysis, a 100-year hurricane event across the county would cause an estimated $1.08 billion in building related damages. The results of the Hazus loss estimate are summarized in Table 4.92. Table 4.92 – Hazus Building-Related Loss Estimates by Hurricane Return Period, Countywide Area Residential Commercial Industrial Others Total 50-year Hurricane Event Building $302,743,220 $5,154,940 $1,651,650 $7,033,000 $316,582,810
Content Inventory
$115,949,760
$162,400 $19,220
$290,020 $49,020 $1,990,690 $5,755,980 $2,035,860 $327,310 $8,119,150 $44,471,240 $28,380,710 $4,475,750 $77,327,700 $93,147,780 $65,308,390 $10,163,650 $168,619,820
$1,396,380
$117,798,560
$0
$75,000
$143,240
Total
$418,692,980
$5,336,560
$8,504,380
$434,524,610
100-year Hurricane Event Building
$753,316,530 $269,916,990
$15,486,930 $1,455,000
$22,361,430 $5,890,950
$796,920,870 $279,298,800
Content Inventory
$0
$369,570
$732,580
$1,429,460
Total
$1,023,233,520
$17,311,500
$28,984,960
$1,077,649,130
500-year Hurricane Event Building
$3,017,815,380 $1,090,555,780
$99,675,360 $26,796,730 $5,656,220 $132,128,310 $225,605,180 $79,591,820 $16,803,530 $322,000,530
$116,976,510 $42,454,490 $5,420,170 $164,851,170 $222,755,280 $93,201,500 $13,880,740 $329,837,520
$3,278,938,490 $1,188,187,710
Content Inventory
$0
$15,552,140
Total
$4,108,371,160
$4,482,678,340
1000-year Hurricane Event Building
$4,791,515,130 $1,779,726,900
$5,333,023,370 $2,017,828,610
Content Inventory
$0
$40,847,920
Total
$6,571,242,030
$7,391,699,900
Source: Hazus version 6.1
ENVIRONMENT Hurricane winds can cause massive damage to the natural environment, uprooting trees and other debris within the storm’s path. Animals can either be killed directly by the storm or impacted indirectly through changes in habitat and food availability caused by high winds and intense rainfall. Endangered species can be dramatically impacted. Forests can be completely defoliated by strong winds.
CONSEQUENCE ANALYSIS
Table 4.93 summarizes the potential negative consequences of hurricanes and tropical storms. Table 4.93 – Consequence Analysis – Hurricane and Tropical Storm Category Consequences Public
Impacts include injury or death, loss of property, outbreak of diseases, mental trauma and loss of livelihoods. Power outages and flooding are likely to displace people from their homes. Water can become polluted such that if consumed, diseases and infection can be easily spread. Residential, commercial, and public buildings, as well as critical infrastructure such as transportation, water, energy, and communication systems may be damaged or destroyed, resulting in cascading impacts on the public.
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 171
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