How is the Special Flood Hazard Area (SFHA) represented on FEMA maps?

The Special Flood Hazard Area (SFHA) is represented on FEMA maps as zones that begin with the letter A or V. These zones indicate areas that are at a higher risk of flooding, with different characteristics based on whether they are coastal (Zones beginning with V) or inland (Zones beginning with A).

Zone A represents areas that are subject to inundation by the 1-percent-annual-chance flood event, often referred to as the base flood. Zone V, on the other hand, pertains to coastal areas that are subject to flooding and additional hazards due to storm waves. This designation is critical for floodplain management and helps in identifying areas where flood insurance is required and where special building requirements are necessary to mitigate flood risk.

Other representations, such as circles, shaded areas, or dotted lines, do not correctly communicate the specific risks and classifications associated with the SFHA as determined by FEMA's mapping conventions. These alternatives do not provide the clarity necessary for understanding flood risk areas.