SECTION 4: RISK ASSESSMENT
ENVIRONMENT Tornadoes can cause massive damage to the natural environment, uprooting trees and other debris within the tornado’s path. This is part of a natural process, however, and the environment will return to its original state in time.
CONSEQUENCE ANALYSIS
Table 4.121 summarizes the potential negative consequences of tornado. Table 4.121 – Consequence Analysis - Tornado Category Consequences Public Injuries; fatalities Responders
Injuries; fatalities; potential impacts to response capabilities
Continuity of Operations (including Continued Delivery of Services) Property, Facilities and Infrastructure
Potential impacts to continuity of operations due to storm impacts; delays in providing services
The weakest tornadoes, EF0, can cause minor roof damage, while strong tornadoes can destroy frame buildings and even badly damage steel reinforced concrete structures. Buildings are vulnerable to direct impact from tornadoes and also from wind borne debris. Mobile homes are particularly susceptible to damage during tornadoes.
Environment
Potential devastating impacts in storm’s path
Economic Condition of the Jurisdiction Public Confidence in the Jurisdiction’s Governance
Contingent on tornado’s path; can severely impact/destroy critical infrastructure and other economic drivers Public confidence in the jurisdiction’s governance may be influenced by severe tornado events if response and recovery are not timely and effective.
HAZARD SUMMARY BY JURISDICTION
The following table summarizes tornado hazard risk by jurisdiction. Tornado hazard risk does not vary substantially by jurisdiction.
Spatial Extent
Warning Time
Jurisdiction
Probability
Impact
Duration
Score
Priority
Wake County
3 3 3 3 3 3 3 3 3 3 3 3 3
3 3 3 3 3 3 3 3 3 3 3 3 3
2 2 2 2 2 2 2 2 2 2 2 2 2
4 4 4 4 4 4 4 4 4 4 4 4 4
1 1 1 1 1 1 1 1 1 1 1 1 1
2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7
M M M M M M M M M M M M M
Apex Cary
Fuquay-Varina
Garner
Holly Springs Knightdale
Morrisville
Raleigh
Rolesville
Wake Forest
Wendell Zebulon
Wake County, NC Multi-Jurisdictional Hazard Mitigation Plan
WSP June 2024 Page 228
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