What's the difference between FEMA's Zone A and Zone V? Both zones lie within FEMA's 100-year floodplain. Zone V applies only in tidal floodplains and denotes hazards associated with storm-induced waves of at least three feet in height. Construction standards in the V-zone are more stringent in order to account for the increased risk of damage from storm surges. Can I appeal a V-Zone designation? While there is no appeal process for the ABFEs, you may appeal to FEMA after the agency formally proposes flood maps later this year.