SECTION 4: RISK ASSESSMENT
2010 Census Population
2020 Census Population
% Change 2010-2020
2022 ACS Population
Jurisdiction
Knightdale Morrisville Rolesville Wake Forest
18,501 18,655 5,199 31,175 7,889 6,102
29,077 21,999 12,236 38,203
57% 18% 135% 23%
19,127 29,756 9,696 48,047 10,575
Wendell Zebulon
8,423 5,751
7%
-6%
7,421
Wake County (Unincorporated Area)
135,124
230,494
71%
192,408
TOTAL
903,811
1,143,763
27%
1,132,103
Source: NCEM IRISK Database; 2000, 2010, 2020 Decennial Census
Building counts were also provided by the IRISK database. These values were generated using locally- provided building footprint and parcel data. The methodology for generating the building asset inventory is described in greater detail in Section 4.3. Note that these building counts were originally provided in 2010 and it appears that only limited updates subsequently occurred whereas Wake County has since experienced a substantial amount of growth and new development. Therefore, the exposure reflected in the following tables is an underestimate of actual present-day exposure. Section 3 Planning Area Profile describes the growth that has occurred since 2010 and provides a means of estimating the degree to which exposure and vulnerability may have increased. Table 4.8 – Building Counts and Values by Jurisdiction
Jurisdiction
Building Count
Building Value
Raleigh
128,062
$36,926,106,959 $3,460,323,705 $14,607,342,852 $2,268,420,955 $2,243,212,305 $2,876,499,200 $1,240,283,673 $2,166,113,564 $388,407,100 $2,829,746,009 $483,437,990 $616,065,905 $13,561,537,397 $83,667,497,614
Apex Cary
14,915
45,306 11,070 11,975 10,528
Fuquay-Varina
Garner
Holly Springs Knightdale
7,144 5,181 2,103
Morrisville Rolesville
Wake Forest
10,547 3,728
Wendell Zebulon
3,231
Wake County (Unincorporated Area)
59,919
TOTAL PLAN
313,709
Source: NCEM IRISK Database
For some hazards in this risk assessment, FEMA’s Hazus software was used to provide loss estimates and better understand vulnerability. These analyses were run using the built-in asset inventory in Hazus, which estimates there are 371 thousand buildings in the county, with a total building replacement value of $215.283 billion. Table 4.9 provides an estimate of the number of pre-FIRM buildings in each jurisdiction. This analysis was prepared using NCEM’s IRISK database and comparing the year built for each structure to the corresponding community’s initial Flood Insurance Rate Map (FIRM) date. The pre -FIRM building counts include all building constructed prior to the year of the initial FIRM.
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 73
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