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4. Hazard Imnact <br /> Some natural hazards have greater impacts than others,but occur infrequenfly(severe <br /> earthquakes) and others hazards occur annually or several time a year but cause less <br /> damage(thunderstorms). The impact is a combination of the magnitude of the event,how <br /> large an area within the community is affected and the amount of human activity in that <br /> area. The following table explains how the impact is measured. <br /> Measurement of T es of Hazard Im acts <br /> Maenitude(percent of <br /> T e ro eri in count dama ed) Severi <br /> Catastrophic More than 50% Multiple deaths,complete shutdown of facilities for 30 days or <br /> more.50%of ro ert dama ed. <br /> Critical ' 25%to 50% Multiple severe injuries,complete shutdown of critical facilities <br /> for 2 weeks,more than 25%of ro ert dama ed. <br /> Limited 10%to 25% Some injuries,complete shutdown of critical facilities for more <br /> than a week.More than 10%of ro ert dama ed. <br /> Negligibie Less than 10% Minor injuries,minimal quality of life impact,shutdown of <br /> critical facilities for 24-hours or less.Less than 10%of property is <br /> severel dama ed. <br /> Oran e Count Hazard Identification and Ana1 sis <br /> Imnacts <br /> Area Catastrophid <br /> Likelihood of SmalUMedium/ Critical/Limited/ <br /> Hazard Occurrence Lar e Ne li 'ble Hazard Index <br /> Hurricanes Possible Laz e Critical Low <br /> Floods Possible Lar e Ne li ible Hi h <br /> Tornadoes • Possible Medium Limited Moderate <br /> Drou ht and Heat Wave Possible Lar e Limited Moderate <br /> Nor'easter Unlikely Medium Limitedl Low <br /> Ne li ible <br /> Thunderstorms Hi hl Likel Lar e Ne li ible Low <br /> Severe Winter Likely Large Negligible Moderate <br /> Storm <br /> Wildfire Possible/Unlikel Medium Ne li ible Low <br /> Chemical S ills Likel Small Limited Moderate <br /> River Basins Possible Large Limited Low <br /> Dam Failure <br /> Earth uake Unlikel Lar e Critical Low <br /> Tsunamis Unlikel Medium Limited Low <br /> Volcano Unlikel Medium Critical Low <br /> Landslide Possible Small Ne li ible Moderate <br /> Plane Crash Possible Small Limited Low <br /> Data Sources: North Carolina Emergency Management, Orange Counry Emergency Management, "Keeping Natural <br /> Hazards From Becoming Disasters" <br /> 30 <br />