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Tennessee: Risks & Trends

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Same standard as every other page on this site: every figure below is independently sourced, and figures that vary across sources, or measure genuinely different things, are flagged as such rather than collapsed into one number that looks more precise than the underlying data actually supports.

Memphis and the New Madrid Seismic Zone

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Memphis metro population directly exposed 1,000,000+
50-year probability of a magnitude 6.0+ earthquake in the zone 25-40%
Regional population across the 8-state highest-risk zone ~11-12 million
Key vulnerability factor Aging, often unreinforced buildings, including some schools and fire/police stations
Secondary hazard Soil liquefaction along the Mississippi and Wolf Rivers through downtown Memphis

Why Memphis carries more consequence than Illinois's exposure, covered elsewhere on this site

Illinois’s page covers this same fault system from southern Illinois counties like Cairo, which sit close to the zone geographically but have small populations, Cairo’s is under 2,000. Memphis is a genuinely different scale of exposure: a metro area of more than a million people combined with aging, often unreinforced infrastructure and riverside liquefaction risk. What makes Memphis’s exposure so consequential is how many people and how much vulnerable infrastructure sit inside the zone, not a claim that the zone’s own seismic probability is higher there than elsewhere along it.

The Chimney Tops 2 Fire (2016): the deadliest eastern U.S. wildfire since the 1940s

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Start date and location November 23, 2016, Chimney Tops Trail, Great Smoky Mountains National Park
Date it reached Gatlinburg 5 days later, November 28
Deaths 14
Injuries 200+
People evacuated ~14,000
Acres burned ~17,136
Structures damaged or destroyed ~2,460
Insurance claims Approaching $1 billion

What made this fire unusual wasn’t just its scale, it’s that it happened in a place with none of the typical Western wildfire signals: dense Appalachian hardwood forest, generally high humidity, and a town built up right against national park land with limited expectation that fire would ever reach it directly.

What these two have in common

Memphis’s earthquake exposure and Gatlinburg’s wildfire history share a structural theme this site returns to often: both risks are real and well-documented, but neither fits the stereotype most residents associate with their region. Tennessee isn’t conventionally thought of as earthquake country or wildfire country, and both risks are exactly the kind that get underprepared for as a result.

Sources