Guam Hazard Mitigation Plan - Western States Seismic Policy Council

SECTIONFIVERisk AssessmentTable 5-2Summary Historical Record of Hazards on GuamHazardTropical Cyclone/TyphoonNumber of RecordsDisaster/EmergencyDeclarationsHistorical RecordsRecorded DamagesOtherSignificantEvents Total Fatalities Injuries Losses ($)11 190 198 86 461 $2,017,611,796Further Evaluation/MajorHazard CategoryTropicalCyclone/TyphoonVolcano 0 0 0 0 0 $0 No further considerationWildland Fire 1 5 6 0 1 $250,000 Wildland FireNote: “Declarations” refers to Presidentially declared disasters or emergencies. The hazard event database covers the period1671 to 2010, though approximately 90 percent of the records are from 1970 to the present. Information on fatalities, injuries,and property damage is available for only a small proportion of the total number of records and should be considered incomplete.N/A = not availableSources: FEMA 2011; Guam Power Authority 2011; NWS-WFO 2011; NTSB 2004b; HS/OCD 2003; National Response Center2011; USGS 2011; NCDC 2011; URS 2011.During the development of the 2005 Guam HMP, the HMAC and other interested partiesreviewed and screened the hazards identified in Table 5-2 (currently updated to reflect the years2005 to 2010) based on the following:• Results of the historical hazard event database• Expert opinion of the risk presented by the hazards• Ability to mitigate the hazard through the DMA 2000 process• The known or expected availability of information on the hazardThe HMAC subsequently decided that the following major hazards should be profiled, each ofwhich is addressed in detail below (including numerous subhazards):• Coastal erosion• Disease• Drought• Earthquake (surface fault rupture, liquefaction, and lateral spread)• Flooding (coastal flooding, riverine flooding, and stormwater runoff)• Hazardous materials• High surf• Lightning• Non-seismic ground failure (sinkholes)• Salt spray• Severe wind• Slope failure (landslide, mudslide, and post-fire debris flow)5-4