ANNEX B: CITY OF RALEIGH
B.3.2 Wildfire Table B.15 summarizes the acreage in the City of Raleigh that falls within the Wildland Urban Interface (WUI), categorized by housing density. Areas in the WUI are those where development may intermix with flammable vegetation. 18 percent of the City of Raleigh is not included in the WUI. Table B.15 – Wildland Urban Interface Acreage, City of Raleigh
Housing Density
Total Acreage
Percent of Total Acreage
Not in WUI
20,688.0
18.0%
LT 1hs/40ac
4,359.1
3.8%
1hs/40ac to 1hs/20ac
2,579.8
2.2%
1hs/20ac to 1hs/10ac
3,549.9
3.1%
1hs/10ac to 1hs/5ac
4,720.0
4.1%
1hs/5ac to 1hs/2ac
8,663.3
7.5%
1hs/2ac to 3hs/1ac
54,281.6
47.2%
GT 3hs/1ac
16,195.1
14.1%
Total
115,066.8
Source: Southern Wildfire Risk Assessment
Figure B.5 depicts the WUI for the City of Raleigh. The WUI is the area where housing development is built near or among areas of vegetation that may be prone to wildfire. Figure B.6 depicts the Fire Intensity Scale, which indicates the potential severity of fire based on fuel loads, topography, and other factors. Figure B.7 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.16 provides building counts and estimated damages for Critical Infrastructure and Key Resources (CIKR) buildings by sector at risk to wildfire hazard. Table B.16 – Critical Facilities Exposed to Wildfire, City of Raleigh
Sector
Event
Number of Buildings at Risk
Estimated Damages
Transportation Systems Wildfire Hazard
2 2
$381,965 $381,965
Wildfire Hazard
All Categories
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
317
Made with FlippingBook interactive PDF creator