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Florida Flood Map & Inundation Risk

Florida flood map intelligence platform monitors over 1,350 miles of vulnerable coastline, porous limestone hydrology, and 3.5 million properties in Special Flood Hazard Areas across both Atlantic and Gulf basins.

Primary Threats:Atlantic & Gulf Hurricane Storm SurgesPorous Karst Limestone Subterranean SeepageKing Tide Sunny Day Tidal BackflowExtreme Tropical Cyclone Precipitation

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Mean Elevation
100 ft ASL
Coastal Exposure
1350 Miles
High-Risk Parcels
3.5 Million+
Monitored Metros
6 Zones
Topographic & Hydrological Profile

Why Florida Floods: Geological Inundation Mechanics

Unlike states with clay or dense bedrock, Florida sits upon a porous karst limestone platform characterized by thousands of interconnected subterranean channels and shallow freshwater aquifers. Consequently, conventional sea walls cannot stop seawater intrusion during King Tides or storm surges; water bypasses barriers from beneath, rising through municipal drainage networks and lawn topsoil. With an average statewide elevation under 100 feet and extensive coastal developments at less than 6 feet above mean sea level, minor tidal anomalies trigger significant street inundation.

Florida Key Metropolitan Risk Tiers

Elevations above sea level, coordinates, and predominant FEMA/regional flood classifications.

Miami / Miami Beach
4 ft ASL•Zone AE & VE
Extreme
Tampa / St. Petersburg
15 ft ASL•Zone AE
Extreme
Cape Coral / Fort Myers
5 ft ASL•Zone AE & VE
Extreme
Jacksonville
16 ft ASL•Zone AE
High
Key West
3 ft ASL•Zone VE
Extreme
Orlando (Inland Basins)
82 ft ASL•Zone X & A
Moderate
Historical Benchmarks

Major Catastrophic Flood Disasters in Florida

202410.2 ft Storm Surge

Hurricane Helene & Milton

Record 8 to 10-foot storm surges in Tampa Bay and catastrophic wind-driven flooding across the central Florida peninsula.

202215.5 ft Storm Surge

Hurricane Ian Landfall

Devastated Fort Myers Beach and Sanibel Island with catastrophic 12 to 18-foot storm surges and $112 billion in total damage.

20176.8 ft River Crest

Hurricane Irma

Severe surge across the Florida Keys followed by historic 100-year freshwater flooding along the St. Johns River in downtown Jacksonville.

Regional Underwriting & Regulatory Mandate

Florida legislative reforms (Senate Bill 2-A) mandate that all residential policyholders insured with Citizens Property Insurance Corporation must obtain separate flood insurance coverage, phasing in through 2027 regardless of FEMA flood zone designation. Standard homeowners policies strictly exclude flood and storm surge damage.

People Also Ask (Florida)

Frequently Asked Questions About Florida Flood Maps

State-specific answers on flood insurance regulations, storm surges, and high-risk elevation certificates.

Yes. Under Florida Senate Bill 2-A, homeowners insured through Citizens Property Insurance Corporation are legally required to carry flood insurance policies. The mandate applies first to Special Flood Hazard Areas and phases in to all Citizens policyholders by 2027, regardless of whether the home is in Zone X, AE, or VE.
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