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Eugene -Springfield Area Natural Hazards Mitigation Plan <br />2. Hazard Descriptions <br />The EOC acts on the City's behalf to link our emergency responders with <br />mutual -aid, local partners, and County, State, and Federal response <br />agencies. <br />• Conducting community outreach to support our resiliency strategy by <br />increasing community personal preparedness. A prepared community eases <br />the burden on first responders by reducing the immediate need for food, <br />water, and personal care for individuals in the days and weeks following a <br />disaster or emergency. <br />• Connecting the City of Eugene to data and voice through a portable <br />redundant communications system using satellite technology. This system <br />allows the Eugene EOC to communicate beyond our local radio and <br />microwave footprint in a degraded communications environment. <br />• Constructing seismic retrofits for several critical City -owned bridges. <br />• Initiating seismic retrofits to Springfield City Hall with additional retrofits <br />to be performed pending available funding. <br />2.4 Extreme Weather <br />Extreme weather includes hail, lightning, tornados, and severe heat. The Eugene - <br />Springfield area has had documented occurrences of all four of these meteorological <br />incidents though they tend to be infrequent resulting in little to no damage. It is <br />possible more damaging incidents could occur in the future. <br />2.4.1 Causes and Characteristics of the Hazard <br />Thunderstorms <br />Thunderstorms can produce wind, hail, lightning, and even tornadoes. A <br />combination of unstable air, moisture, and an upward lifting motion forms a <br />thunderstorm. Generally, this upward motion, convection, is produced by surface <br />heating. Convection forces the warmer air up into a cooler air mass causing <br />instability. <br />A thunderstorm has three stages of development: <br />• Developing <br />• Mature <br />• Dissipating <br />The mature phase of a thunderstorm is the most likely time for hail, heavy rain, <br />lightning, strong winds, and tornadoes. Once enough precipitation has accumulated <br />2-20 January 2020 <br />