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Eugene -Springfield Area Natural Hazards Mitigation Plan <br />2. Hazard Descriptions <br />available resources, Eugene -Springfield's capacity to respond to a volcanic incident <br />is high. <br />2.8.7 Risk Assessment <br />Based on the vulnerability, probability, and capacity scores determined by the <br />Steering Committee this hazard poses a low risk to the Cities. Volcanic eruptions <br />can occur any time in the Eugene -Springfield area, but the average recurrence <br />interval is about 1,500 years making this hazard rather rare compared to others <br />within this plan. Despite the rarity, we know such incidents have affected the area <br />and will affect it in the future. <br />A summary of Volcanic Impact Risks is in Table 2-11. <br />Table 2-11 Volcano - Impact Risks <br />Cascading Incident <br />Rankin <br />Civil Unrest <br />No Known <br />Dam or Levee Failure <br />No Known <br />Epidemic <br />Low <br />Hazardous Materials <br />No Known <br />2.8.8 Existing Hazard Mitigation Activities <br />There are no hazard specific mitigation activities for a volcanic eruption. Several <br />existing multi -hazard mitigation items may also mitigate the effects of a volcanic <br />incident. <br />2.9 Wildfire <br />The probability of wildfire is high in Eugene -Springfield while vulnerability is <br />moderate in both cities. <br />2.9.1 Causes and Characteristics of Wildfires <br />Fire is an essential part of Oregon's ecosystem, but it is also a serious threat to life <br />and property particularly where urban areas encroach upon forested, open range, or <br />grassland areas. Wildfires occur when fire consumes large vegetated areas, in some <br />cases requiring responder suppression. <br />In this region, changes in historic vegetation, climate, and fire occurrence are <br />resulting in changes to the patterns and character of fire. In short, the risks and <br />potential impacts of wildfire are increasing. <br />The Eugene -Springfield area is bordered by grassland, agricultural land, and forest. <br />The wildfire hazard is primarily located in the south hills of both Eugene and <br />Springfield where forested areas interface directly with homes, businesses, and <br />2-57 January 2020 <br />