The letter designations describe different risk determinations based on the available scientific studies of the area. For example, an AE zone will be inundated by the 100 year flood (1% annual chance) as determined by a detailed study. For AE zones the base flood elevation (BFE) is provided. Generally speaking A zones refer to inland flood zones and V zones refer to coastal flood zones with wave action. For detailed information on all of the flood zones, review the training modules on the educational resources portion of this website.
What do the different flood hazard designations mean?
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