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2025 Hazard Mitigation Plan <br />Kittitas Gounty, Washington <br />',,{*' <br />See Saffir-Simpson Hurricane <br />Wind Scale.12 >63 Hurricane <br />Air filled with foam, waves over 45 <br />feet, sea completely white with <br />driving spray, and visibility greatly <br />reduced. <br />Tornado rating, based on the Enhance Fujita Scale (EF Scale), is assigned after tornado-related damage <br />is surveyed. The EF Scale is based on the estimated wind speeds and related damage. Table 4-99 <br />outlines the EF Scale. When tornado damages are surveyed, they are compared to a list of Damage <br />lndicators and Degrees of Damage which help to better estimate the range of wind speeds the tornado <br />likely produced. The EF Scale was revised from the original Fujita Scale and became operational in <br />February 2007.202 <br />Table 4-99. Enhanced Fujita Scale <br />The NWS HeatRisk Tool Prototype is a color numeric-based index that provides a forecast of the potential <br />level of risk for heat-related impacts to occur in a24-hour period. This serves as a supplementary toolfor <br />official NWS heat products and is meant to provide risk guidance for decision-makers and heat-vulnerable <br />populations who require certain actions at levels that may be below the NWS heat product thresholds. <br />Table 4-100 outlines the NWS HeatRisk categories and risk of heat-related impacts..203 <br />Table 4-100. NWS HeatRisk Gategories <br />202 NationalWeather Service. (n.d.). The Enhance Fujita Scale (EF Scale). Retrieved from <br />https ://www.weath er. gov/ou n/efsca le. <br />203 NationalWeather Service. (n.d.). NWS HeatRisk Prototype. Retrieved from <br />https ://www.wrh. noaa. gov/wrh/heatrisld. <br />0 65-85 <br />1 86-110 <br />2 111 - 135 <br />136 - 1653 <br />166-2004 <br />5 Over 200 <br />3 Second GustEF Rating <br />0 Green Little to no risk from expected heat. <br />1 Yellow Minor: This level of heat affects primarily those individuals extremely sensitive to heat, <br />especially when outdoors without effective cooling and/or adequate hydration. <br />Risk of Heat-Related lmpactsCategory <br />Chapter 4: Hazard ldentification and Risk Assessment 160