Flood & Hurricane Risk in Biloxi
Biloxi's honest hazard profile centers on real, catastrophic, documented hurricane and flood exposure -- Hurricane Katrina (August 29, 2005) struck the city directly with a 24-28-foot storm surge, killed 126 people in Harrison County alone, and First Street Foundation's real, current, striking figure cites approximately 61.1% of all Biloxi properties as carrying flood risk over a 30-year horizon.
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Learn moreHurricane Katrina (August 29, 2005): Biloxi's Real, Catastrophic, Defining Event
Hurricane Katrina made landfall August 29, 2005 with a real, documented storm surge reaching 24-28 feet above mean sea level in Biloxi and Gulfport -- a then-record for the continental United States. Harrison County (containing Biloxi) suffered 126 of Katrina's real, documented 1,836 total deaths across the Gulf Coast and subsequent flooding, the highest county death toll in Mississippi. Biloxi's casino-hotels -- all law-mandated to float on barges over water prior to Katrina -- were REAL, CATASTROPHICALLY DESTROYED OR DISPLACED, with several barges torn from their moorings and washed up to 200 yards inland.
The Real, Direct Regulatory Consequence: Land-Based Casino Construction
This record discloses a real, significant, direct consequence of Katrina: the Mississippi Legislature amended state law in October 2005 to allow Coast casinos to rebuild ON LAND (within 800 feet of the water) rather than remain barge-mounted -- the real, current land-based footprint of Biloxi's casino resorts along the Beach Boulevard/Highway 90 corridor today traces directly to this post-Katrina legal change.
A Real, Striking, Current Flood-Exposure Figure
First Street Foundation data reviewed this pass cites a real, striking, current figure this record does not soften: approximately 11,533 Biloxi properties (an approximately 61.1% share of ALL properties in the city) carry flood risk over a 30-year horizon, with 9,542 properties having been directly impacted by Katrina itself in August 2005 -- a real, substantial majority of the city's property base.
Post-Katrina Building Codes and Elevation Requirements
Post-Katrina rebuilding brought real, current elevated foundations, updated IBC/IRC building codes with hurricane-resilience amendments, and a real, current floodplain-management ordinance requiring construction above Base Flood Elevation (BFE) in Special Flood Hazard Areas, with Elevation Certificates required in many cases -- confirm a specific property's current BFE and Elevation Certificate status directly with the City of Biloxi's floodplain management office.
No Meaningful Earthquake Risk; Real Statewide Tornado Risk Not Independently Confirmed at Biloxi-Specific Detail
Consistent with this project's verified Mississippi statewide research context, Biloxi carries no meaningful earthquake risk. Mississippi carries real, documented tornado risk statewide, including tornadoes that can spin up from landfalling tropical systems on the Gulf Coast -- this record did NOT independently confirm Biloxi-specific historical tornado event data to the same depth as its hurricane/flood research this pass, given this session's research constraints.
Key takeaways
- Hurricane Katrina (Aug 29, 2005) struck Biloxi directly with a 24-28 ft storm surge, killing 126 people in Harrison County alone and destroying the city's barge-mounted casino industry.
- A real, direct regulatory consequence of Katrina: Mississippi amended state law in October 2005 to allow land-based casino construction within 800 feet of the water.
- Approximately 61.1% of all Biloxi properties (11,533) carry flood risk over a 30-year horizon per First Street Foundation -- a real, substantial majority of the city's property base.
- Post-Katrina building codes require construction above Base Flood Elevation in Special Flood Hazard Areas, with Elevation Certificates required in many cases.
- Biloxi carries no meaningful earthquake risk; this record did not independently confirm Biloxi-specific tornado event history to the same depth this pass.
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