Flood Maps

FLOOD HAZARD ASSESSMENT TOOL – The FHAT is an online GIS mapping application developed by DLNR for viewing FEMA’s Digital Flood Insurance Rate Maps (DFIRM). This informational web application allows public users to search and view a mashup of data to assess flood risk for areas of interest.

Open Map Viewer

EVERYONE LIVES IN A FLOOD ZONEDOWNLOAD FLOOD ZONE DEFINITIONS

WHAT MAY AFFECT OR CHANGE A FLOOD MAP? 

FIRM updates can occur in a variety of ways, including Flood Risk Projects, Physical Map Revisions (PMRs), and Letters of Map Revision (LOMRs). Letters of Map Amendment (LOMAs) and Letters of Map Revision Based on Fill (LOMR-Fs) can change flood hazard designations for specific structures or properties. Each of these processes is summarized in the table below:

Download Factsheet and Table

HOW TO REQUEST A MAP AMENDMENT GUIDE

Letters of Map Amendment (LOMA) or Letters of Map Revision Based on Fill (LOMR-F) are processes to gain a better understanding of your home’s flood risk – and potentially lower your flood insurance premium. This document provides criteria to determine if a homeowner is eligible for a LOMA or LOMR-F, the process for applying, and next steps upon receiving a determination letter:  Download Guide

For application materials, visit MT-1 Application Forms and Instructions for Conditional and Final Letters of Map Amendment and Letter of Map Revision Based on Fill (https://www.fema.gov/media-library/assets/documents/31858).

USING LIDAR FOR MAP AMENDMENTS

LiDAR data can replace the requirement to submit elevation information certified by a licensed land surveyor or professional engineer, which can create a cost savings for property owners. However, LiDAR data may be less accurate than certified elevations and may not capture the full risk for the building or lot.  For more information on the use of LiDAR data for Map Amendments, download: FACTSHEET.  For more information on the standard LOMA process and requirements, please refer to How to Request a Map Amendment Guide.  

CREATING FIRMettes

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