![]() ![]() Also known as “X (shaded)” or “500-year floodplain”. Zone X 0.2% (Old B): Areas of 0.2% annual chance of flood. Zone X (Old C): Areas determined to be outside the 0.2% annual chance floodplain. Zone VE (Old V1-V30): Coastal flood zone with velocity hazard (wave action) BFE determined. For areas of alluvial fan flooding, velocities also determined. Zone AO: Flood Depths of 1-3 feet (ares of sheet flow on sloping terrain). ![]() Zone AH: Flood Depths of 1-3 feet (areas of ponding), usually shallow flooding. Zone AE (Old A1-A30): Detailed study, BFE determined. Zone A: Approximate Zone, no Base Flood Elevation (BFE) determined. Often referred to as the “100-Year Flood”, which frequently causes confusion.īase Flood Elevation is the elevation, above sea level, at which Base Flood will inundate. All SFHA’s are flood zones, not all flood zones are SFHA's.īase Flood is the area where flood has a 1% chance of being equaled or exceeded in any given year. ![]() Sometimes the SFHA is casually referred to as the “Flood Zone”, but these terms shouldn’t be confused. This is where flood insurance may be required depending on structure location. Some important points and definitions to know:Ī Flood Zone is any zone delineated on a FEMA Flood Insurance Rate Map (FIRM)Ī Special Flood Hazard Area (SFHA) is a high risk flood zone, and is the land area covered by the base flood on a FIRM. The different zones illustrate whether you live in a high-risk, low-risk, or moderate-risk flood zone. Everyone lives in an area with some flood risk-it’s just a question of what level of risk is present. Everyone is in a Flood Zone, Not Everyone is in a Special Flood Hazard Area.Įvery property is mapped within a flood zone of some kind. ![]()
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