SECTION 4: RISK ASSESSMENT
Table 4.52 – Critical Infrastructure and Key Resources Buildings at Risk to Flood Events by Sector Sector Event Number of Buildings At Risk Estimated Damages Banking and Finance 10 Year 1 $30,522 25 Year 1 $48,579 50 Year 1 $51,662 100 Year 2 $724,548 500 Year 4 $1,131,379 Commercial Facilities 10 Year 35 $$338,700 25 Year 60 $1,865,809 50 Year 88 $3,112,349 100 Year 105 $19,012,746 500 Year 181 $104,414,301 Critical Manufacturing 25 Year 3 $22,595 50 Year 7 $285,471 100 Year 9 $452,833 500 Year 15 $1,806,744 Government Facilities 100 Year 5 $192,635 500 Year 9 $446,959 Healthcare and Public Health 500 Year 2 $95,195 Transportation Systems 100 Year 4 $254,518 500 Year 7 $2,168,332 All Categories 10 Year 39 $419,893 25 Year 67 $2,050,660 50 Year 101 $3,604,159 100 Year 127 $20,669,338 500 Year 220 $110,063,686 Source: NCEM Risk Management Tool To supplement the IRISK assessment of property at risk from the 1% annual chance flood event, the planning team also evaluated flood risk using a level one analysis in FEMA’s Hazus software. Per this analysis, a 1% annual chance flood event across the county would cause an estimated $511.6 million in building related damages. The results of the Hazus loss estimate are summarized in Table 4.53. Table 4.53 – Hazus Building-Related Loss Estimates, 1%-Annual-Chance Flood Event, Countywide Occupancy Type Total Estimated Content Loss Estimated Total Damage Loss Ratio
Total Value (Building & Contents)
Estimated Building Damage
Buildings with Loss
Agriculture Commercial Educational Government Industrial Religious Residential
94
$7,626,000 $471,253,000 $248,659,000 $53,955,000 $41,956,000 $16,847,000 $321,787,000 $1,162,083,000
$834,000
$2,393,000 $118,191,000 $48,060,000 $5,392,000 $24,003,000 $6,179,000 $87,657,000 $291,875,000
$3,227,000
42% 34% 22% 12% 82% 42% 77% 44%
516
$40,293,000 $6,287,000
$158,484,000 $54,347,000 $6,290,000 $34,323,000 $7,052,000 $247,863,000 $511,586,000
58 36
$898,000
284
$10,320,000
82
$873,000
1576
$160,206,000 $219,711,000
Total
2,646
Source: Hazus version 6.1
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 148
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