Res 2018-025/adopting the 2018 Hays County, Texas Hazard Mitigation Plan as the official plan of the City; authorizing the inclusion of the City of San Marcos Hazard Mitigation Plan as an appendix; designating the City Manager as the official authorized

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Chapter 2: Risk Assessment “The risk assessment provides the foundation for the rest of the mitigation planning process, which is focused on identifying and prioritizing actions to reduce risks to hazards.” –FEMA Local Mitigation Planning Handbook, 2013 Risk Assessment activities were conducted at a 2nd MPC meeting held from 1 pm to 4 pm on January 12, 2017 at the Wimberley Community Center in Wimberley, Texas. During the meeting, the four steps of the Risk Assessment process were reviewed, with information provided for each. The steps are shown below. 4 Step Process: Risk Assessment Step 1. Step 2. Step 3. Step 4. Identify Summarize Analyze Risks Describe Hazards Community Assets Vulnerabilities The hazard profiles within this Chapter include descriptions of each natural hazard, the hazard location, and the extent scale used for measuring hazard event magnitude. Historical weather and hazard occurrence data and applicable national datasets were used to update this chapter and each jurisdiction-specific annex hazard profiles. The history of events within each jurisdiction (emphasis on those occurring from 2011-2016), probability of future events within the jurisdiction, and impact of past and potential events in the jurisdiction were also determined and updated. State and national datasets were used to determine occurrence, extent, and the respective probabilities rather than verbal testimonies in an effort to retain data consistency. Verbal testimony, when available, was integrated into impact or vulnerability statements. 2.1 Step 1. Describe Hazards Expansive Soils was added to the HMP during Phase 1, as communities determined the hazard profiles to be included in their plans. There were also modifications to the State (Texas Division of Emergency Management) classifications of hazards in the Texas State Hazard Mitigation Plan and those changes needed to be incorporated into the update. These changes are shown in Table 2.1. Floods (Riverine and Shallow)Floods TornadoesTornadoes Winter Storm, Extreme Cold, Ice StormSevere Winter Storms Dam Failure Dam/Levee Failure Wildfire / Brush FireWildfires Tropical Storms and Tropical CyclonesHurricanes/Tropical Storms DroughtDrought Seismic/EarthquakeEarthquakes Hail StormHailstorms Extreme HeatExtreme Heat Severe Thunderstorm/High WindsWindstorms Lightning Expansive Soils 26