ANNEX B: CITY OF RALEIGH
B.1.5 WILDFIRE Table B.6 summarizes the acreage in the City of Raleigh that falls within the Wildland Urban Interface (WUI), categorized by housing density. The WUI is the area where housing development is built near or among areas of vegetation that may be prone to wildfire. Areas in the WUI are those where development may intermix with flammable vegetation. Over 18 percent of the City of Raleigh is not included in the WUI. Table B.6 – Wildland Urban Interface Acreage, City of Raleigh
Housing Density
Total Acreage
Percent of Total Acreage
Not in WUI
17,896.87
18.5%
LT 1hs/40ac
3,214.69
3.3%
1hs/40ac to 1hs/20ac
1,786.20
1.8%
1hs/20ac to 1hs/10ac
2,307.08
2.4%
1hs/10ac to 1hs/5ac
3,001.81
3.1%
1hs/5ac to 1hs/2ac
6,028.08
6.2%
1hs/2ac to 3hs/1ac
46,738.87
48.3%
GT 3hs/1ac
15,864.56
16.4%
Total
96,838.16
100%
Source: Southern Wildfire Risk Assessment
Figure B.12 depicts the WUI for the City of Raleigh. Figure B.13 depicts the Fire Intensity Scale, which indicates the potential severity of fire based on fuel loads, topography, and other factors. Figure B.14 depicts Burn Probability based on landscape conditions, percentile weather, historical ignition patterns, and historical prevention and suppression efforts. Potential fire intensity is highest on the western border of the City of Raleigh; however, this area has lower burn probability and is largely outside of the WUI, meaning little to no development is at risk. The City of Raleigh overall has relatively low burn probability – the highest being in the southwest, although much of this area is outside of the WUI. Table B.7 provides the count and estimated value of all structures that intersect with areas of the City of Raleigh that are rated moderate to high on the WUI Risk Index. Table B.7 – Structures at Risk to Moderate-High WUI Risk Index, City of Raleigh
Occupancy
Structures at Risk
Structure Value
Estimated Content Value
Total Value
Agriculture
45
$9,189,025
$9,189,025
$18,378,050
Commercial
3271
$8,410,352,337
$8,410,352,337
$16,820,704,674
Education
520
$2,865,682,469
$2,865,682,469
$5,731,364,938
Government
816
$2,931,009,121
$2,931,009,121
$5,862,018,242
Industrial
964
$1,718,499,501
$2,577,749,252
$4,296,248,753
Religious
557
$978,591,720
$978,591,720
$1,957,183,440
Residential
121191
$49,475,709,834
$24,737,854,917
$74,213,564,751
Total
127,364 $66,389,034,007
$42,510,428,841 $108,899,462,848
Source: Southern Wildfire Risk Assessment
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 390
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