Public Invited to Review Flood Maps in St. Mary’s County, MD

Release Date Release Number
Release Date:
August 29, 2023

PHILADELPHIA- FEMA is proposing updates to the Flood insurance Rate Map (FIRM) for St. Mary's County, MD. Affected community members and partners are invited to participate in a 90-day appeal and comment period. 

The updated maps were produced in coordination with local, state and FEMA officials. Before the maps become final, community member and partners can identify any corrections or questions about the information provided and submit appeals or comments. 

The 90-day appeal period will begin on or around August 31, 2023. Residents, business owners and other community partners are encouraged to review the updated maps to learn about local flood risks and potential future flood insurance requirements. They may submit an appeal if they perceive that modeling or data used to create the map is technically or scientifically incorrect.

  • An appeal must include technical information, such as hydraulic or hydrologic data, to support the claim. 
  • Appeals cannot be based on the effects of proposed projects or projects started after the study is in progress.
  • If property owners see incorrect information that does not change the flood hazard information—such as a missing or misspelled road name in the Special Flood Hazard Area or an incorrect corporate boundary—they can submit a written comment.

The next step in the mapping process is the resolution of all comments and appeals. Once they are resolved, FEMA will notify communities of the effective date of the final maps.

Submit appeals and comments by contacting your local Certified Floodplain Manager, Valerie Caswell, at The preliminary maps may be viewed online at the FEMA Flood Map Changes Viewer: Changes from the current maps may be viewed online at the Region 3 Changes Since Last FIRM Viewer: CSLF Web Viewer, St. Mary's County, MD

For more information about the flood maps:

  • Use a live chat service about flood maps at (just click on the “Live Chat” icon).
  • Contact a FEMA Map Specialist by telephone; toll free, at 1-877-FEMA-MAP (1-877-336-2627) or by email at

Most homeowner’s insurance policies do not cover flooding. There are cost-saving options available for those newly mapped into a high-risk flood zone. Learn more about your flood insurance options by talking with your insurance agent and visiting

Public Forum & Information

St. Mary’s County Government will be holding a public forum for Saint Mary’s County citizens affected by the proposed map amendment on September 13th, 2023 from 2-4 PM & 6-8 PM in the Main Meeting Room of the Chesapeake Building, located at 41770 Baldridge Street, Leonardtown, Maryland 20650. Local government staff, along with FEMA officials, will be available to answer questions and provide information on the mapping process, appeal process, flood insurance and potential mitigation opportunities.

St. Mary’s County, MD Flood Mapping Milestones

  • November 22, 2021 — Flood Risk Review Meeting to review draft flood hazard data.
  • November 29, 2022 — Preliminary Flood Insurance Rate Map released.
  • January 26, 2023 — Community Coordination and Outreach Meeting to review Preliminary Flood Insurance Rate Map and discuss updates to local floodplain management ordinance and flood insurance.
  • On or Around August 31, 2023 –Appeal Period starts.
  • September 13, 2023 – Public Forum for affected Saint Mary’s County citizens. 
  • August 2024* — New Flood Insurance Rate Map becomes effective and flood insurance requirements take effect. (*Timeline subject to change pending completion of the appeal review process.)

If you have any questions, please contact FEMA Region 3 Office of External Affairs at


FEMA’s mission is helping people before, during, and after disasters. FEMA Region 3’s jurisdiction includes Delaware, the District of Columbia, Maryland, Pennsylvania, Virginia and West Virginia.

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