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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan <br />Volume 2 — Hazard Inventory <br />TABLE 4.3.2B EF Rating Scale <br />Minor' damage. shungles blown off or parts of a <br />roof peeled off, clarnage to,giutters/sidint <br />branches broken off trees, shallow rooted trees <br />EF-0 EN toppled. I i <br />Moderato damage more significant real <br />�� // / damage wundows broken exterior doors <br />%/f , o <br />%� ip � � %F� � damaged or lost, mobile homes overturned or <br />bad!y damaged. <br />Considerable da,rnage roofs torn off well <br />constructed homes, homes shifted off their <br />EF-2 111-135 Mph foundation, mobde homescompletelly <br />destroyed, large trees snapped or uprooted,. <br />f.'.ars can be tossed. <br />....... ............ ""..... ____._... ....____... ......... ............... .......... ............................ <br />''Savers' damage° entire stories of well <br />constructed homes destroyed, significant <br />EF- '1 k ( �� damage done to large b0diimgs, homes with <br />weak foundations can be !blown away„ trees <br />begin to Hose their bark. <br />Extreme' damage: Well constructed homes are <br />F 4 leveled, bars are t1hrown significant distances, <br />top story exteHor walk of rnasonry, buiidings <br />would likely collapse. <br />homes are swept away, steel" reinforced <br />concrete,wucture,5 are critically damaged, <br />high-rise buildings susta�n severe structural <br />I/ stripped of biranches and snapped. <br />4.3.2.4. Potential for Cascading Effects <br />Beyond the destruction and lives that tornadoes leave behind, there are many cascading events or hazards <br />that can follow. If a tornado takes out a power source and there is expected extreme temperatures to <br />follow, you have now increased the number of people vulnerable to extreme heat or cold event <br />consequences. A lack of power impacts the ability of people to remain warm or cool and may also disable <br />medical equipment. If a tornado disrupts farming is, anyway, this can lead to food shortages and/or <br />disrupt the food chain. As debris is deposited anywhere and everywhere from a tornado, this can lead to <br />water contamination, and a fire hazard with lumber from houses, buildings and trees amongst damaged <br />power lines and gas leaks. <br />Another consequence is the economy impact. Indirect losses that occur from the destruction of a tornado <br />are hard to estimate directly after an event. Losses could include lost production, sales, incomes and labor <br />time, increased commute times and transportation costs from goods having to be rerouted, decreased <br />tourist activity, and utility disruptions. Some people might lose their jobs all together. The decreased <br />economic activity also results in lost taxable receipts and uses up federal disaster relief funds to help the <br />clean-up, repair, and replacing of loss assets. Loss of production an also result in surging prices due to <br />shortages. A well-known example of this occurred when refineries were affected by a tornado in the <br />southern United States in 2011, which caused gas prices to rise. <br />72 <br />