Wake County Hazard Mitigation Plan - January 2020

SECTION 4: RISK ASSESSMENT

Elderly Population at Risk

Total Population at Risk

All Children Population

Children at Risk

Total Population

All Elderly Population

Jurisdiction

Number Percent

Number Percent

Number Percent

Holly Springs

25,790 25,790 18,501 18,501 18,655 18,655

100% 100% 100% 100%

2,192 1,572 1,585

2,192 1,572 1,585

100% 100% 100% 100%

1,875 1,345 1,356

1,875 1,345 1,356

100% 100% 100% 100%

Knightdale Morrisville

Rolesville

5,199

5,199

442

442

378

378

Wake Forest

30,382 31,175 102.60%

2,582

2,682 103.90%

2,209

2,261 102.40%

Wendell Zebulon

7,889 6,102

7,889 6,102

100% 100%

670 519

670 519

100% 100%

574 444

574 444

100% 100%

Unincorporated Wake County

135,124 135,124

100%

11,483 11,483

100%

9,825

9,825

100%

Total

900,683 903,811 100.35%

76,540

76,978 100.57%

65,488

65,697 100.32%

Source: NCEM Risk Management Tool

Property

In a severe earthquake event, buildings can be damaged by the shaking itself or by the ground beneath them settling to a different level than it was before the earthquake (subsidence). Buildings can even sink into the ground if soil liquefaction occurs. If a structure (a building, road, etc.) is built across a fault, the ground displacement during an earthquake could seriously damage that structure. Earthquakes can also cause damages to infrastructure, resulting in secondary hazards. Damages to dams or levees could cause failures and subsequent flooding. Fires can be started by broken gas lines and power lines. Fires can be a serious problem, especially if the water lines that feed the fire hydrants have been damaged as well. Wake County has not been impacted by an earthquake with more than a moderate intensity, so damage to the built environment is unlikely. Table 4.26 through Table 4.27 detail the estimated buildings impacted from varying magnitudes of earthquake events.

Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019

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