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<br /> Hazard Mitigation Plan | 2022 <br />Risk Assessment <br />- 36 - <br /> <br />The geographic extent of each of the identified hazards was identified by the Planning Team <br />utilizing maps and data contained in the Santa Ana General Plan (2020) and the Orange County <br />General Plan (2013). Utilizing the Calculated Priority Risk Index (CPRI) ranking technique, the <br />Planning Team concluded the following hazards posed a significant threat against the City. <br />Earthquake | Flood | Climate Change (sub-hazards Drought and Extreme Heat) | <br />Epidemic/Pandemic/Vector-Borne Diseases <br />Q&A | ELEMENT B: HAZARD IDENTIFICATION AND RISK ASSESSMENT | B1e. <br />Q: Does the plan include a description of the extent for all natural hazards that can affect each <br />jurisdiction? (Requirement §201.6(c)(2)(i)) <br />A: See Table: Calculated Priority Risk Index Ranking below. <br /> <br />Q&A | ELEMENT B: HAZARD IDENTIFICATION AND RISK ASSESSMENT | B2b. <br />Q: Does the plan include information on the probability of future hazard events for each jurisdiction? <br />(Requirement §201.6(c)(2)(i)) <br />A: See Table: Calculated Priority Risk Index Ranking below. <br /> <br />The hazard ranking system is described in Table: Calculated Priority Risk Index, while the actual <br />ranking is shown in Table: Calculated Priority Risk Index Ranking for the City of Santa Ana. <br /> <br />Table: Calculated Priority Risk Index <br />(Source: FEMA Emergency Management Institute – Risk Assessment Course) <br />CPRI <br />Category <br />Degree of Risk Assigned <br />Weighting <br />Factor Level ID Description Index <br />Value <br />Probability <br />Unlikely <br />Extremely rare with no documented history of occurrences or <br />events. <br />Annual probability of less than 1 in 1,000 years. <br />1 <br />45% <br />Possibly Rare occurrences. <br />Annual probability of between 1 in 100 years and 1 in 1,000 years. 2 <br />Likely <br />Occasional occurrences with at least 2 or more documented <br />historic events. <br />Annual probability of between 1 in 10 years and 1 in 100 years. <br />3 <br />Highly Likely Frequent events with a well-documented history of occurrence. <br />Annual probability of greater than 1 every year. 4 <br />Magnitude/ <br />Severity <br />Negligible <br />Negligible property damages (less than 5% of critical and non- <br />critical facilities and infrastructure. Injuries or illnesses are treatable <br />with first aid and there are no deaths. <br />Negligible loss of quality of life. Shut down of critical public facilities <br />for less than 24 hours. <br />1 <br />30% <br />Limited <br />Slight property damage (greater than 5% and less than 25% of <br />critical and non-critical facilities and infrastructure). Injuries or <br />illnesses do not result in permanent disability, and there are no <br />deaths. Moderate loss of quality of life. Shut down of critical public <br />facilities for more than 1 day and less than 1 week. <br />2 <br />Critical Moderate property damage (greater than 25% and less than 50% <br />of critical and non-critical facilities and infrastructure). Injuries or 3