Wake County Hazard Mitigation Plan - Adopted 10-21-2024

SECTION 4: RISK ASSESSMENT

influence on earthquake occurrences. However, currently no studies quantify the relationship to a high level of detail, so recent earthquakes should not be linked with climate change. While not conclusive, early research suggest that more intense earthquakes and tsunamis may eventually be added to the adverse consequences that are caused by climate change. VULNERABILITY ASSESSMENT

METHODOLOGIES AND ASSUMPTIONS

Population and property at risk to flooding was estimated using data from the NCEM IRISK database, which was compiled in NCEM’s Risk Management Tool.

PEOPLE Earthquake events in Wake County are unlikely to produce more than mild ground shaking; therefore, injury or death is unlikely. Objects falling from shelves generally pose the greatest threat to safety. Table 4.28 and Table 4.29 detail the population estimated to be at risk from a 250-year earthquake and a 500-year earthquake, respectively, according to the NCEM IRISK database. Table 4.28 – Estimated Population Impacted by 250-Year Earthquake

Elderly Population At Risk

All Children Population

Children At Risk

Population At Risk

All Elderly Population

Total Population

Jurisdiction

Number Percent

Number Percent

Number Percent

Raleigh

476,892 48,639

10%

53,945

6,246

12%

26,904

3,115

12%

Apex

57,525

4,320

8%

5,963

617

10%

3,912

405

10%

Cary

164,869

12,025

7%

19,866

1,737

9%

9,432

825

9%

Fuquay-Varina

32,177

2,972

9%

4,432

526

12%

2,204

262

12%

Garner

35,232

4,534

13%

5,015

734

15%

2,863

419

15%

Holly Springs

30,885

2,402

8%

2,685

250

9%

2,254

210

9%

Knightdale

29,077

3,307

11%

3,207

573

18%

1,917

343

18%

Morrisville

21,999

4,676

21%

1,533

384

25%

1,627

408

25%

Rolesville

12,236

834

7%

1,401

225

16%

919

147

16%

Wake Forest

38,203

3,726

10%

4,777

571

12%

2,891

346

12%

Wendell

8,423

835

10%

1,361

144

11%

418

44

11%

Zebulon

5,751

748

13%

948

116

12%

437

54

12%

Unincorporated Wake County

230,494

22,616

10%

29,196

4,887

17%

14,301

2,394

17%

TOTAL

1,143,763

111,634

10%

134,329

17,010

13%

70,079

8,972

13%

Source: NCEM Risk Management Tool

Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan

WSP June 2024 Page 113

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