Louisiana Flood Maps. The Base Flood on the map. View FEMA’s Flood Insurance Rate Maps FIRMs over road maps and aerial photos get zone, Base Flood Elevation, and contact information for local floodplain officials. Go to the Maps. Get the Guide to Using FloodMaps..Preliminary Louisiana Flood Maps. New and Preliminary Louisiana Flood Maps provide the public an early look at a home or community’s projected risk to flood hazards. This page is for homeowners who want to understand how their current effective Flood Map may change when the preliminary FEMA maps becomes effective..