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 4.79 summarizes the potential negative consequences of tornado. Table 4.79 – Consequence Analysis - Tornado
Category
Consequences
Public
Injuries; fatalities
Responders
Injuries; fatalities; potential impacts to response capabilities due to storm impacts 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.
Continuity of Operations (including Continued Delivery of Services) Property, Facilities and Infrastructure
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.
Jurisdiction Wake County
Probability Impact
Spatial Extent
Warning Time
Duration
Score
Priority
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
H H H H H H H H H H H H H
Apex Cary
Fuquay-Varina
Garner
Holly Springs
Knightdale Morrisville
Raleigh
Rolesville
Wake Forest
Wendell Zebulon
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
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