Final answer:
The SFHA on the FIRM is indicated by zones starting with the letters 'A' or 'V,' which represent areas at high risk for flooding. The letter 'A' signifies non-coastal flood zones, while 'V' denotes coastal areas also impacted by storm waves, both requiring flood insurance if there's a mortgage with a federally backed lender.
Step-by-step explanation:
The SFHA (Special Flood Hazard Area) is shown on the FIRM (Flood Insurance Rate Map) as a Zone that begins with the letter A or V. The FIRM is a key component in floodplain management and is used for flood insurance purposes. Zones starting with the letter 'A' are subject to inundation by the 1-percent-annual-chance flood event. They are also designated as areas that require flood insurance if the property is mortgaged with a federally regulated or insured lender.
Zones beginning with 'V' are coastal areas that have an additional hazard associated with storm waves. These zones are also subject to inundation by the 1-percent-annual-chance flood event. It's important for homeowners, builders, and planners to understand these designations, as they impact insurance rates and building requirements in these high-risk areas.