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Floodplain Management

Floodplain Management

Repetitive Loss Areas

FEMA/ Sussex County Flood Map Portal 

Date: November 3, 2014 






Please click HERE to view the FEMA/ Sussex County Flood Map


New Flood Maps coming March 16, 2015. 


FEMA, the Federal Emergency Management  Agency, is in the process of finalizing revised Flood Insurance Risk Maps (FIRMs) that will be used by the National Flood Insurance Program (NFIP) to determine minimum construction standards and assess risk-based flood insurance rates for those properties located in flood-prone areas. These changes are in response to 1) more accurate topographic data and 2) measured changes in rainfall (e.g., “100-year storm”) and runoff patterns due to land-use changes and development. These maps do not include any consideration of future sea-level rise. 

About two-thirds of Dewey Beach is located in one of the flood zones identified in the preliminary revised FIRMs. The proposed flood-zone maps have some changes from those currently in effect (drawn in 2005). For a significant number of property owners – especially along Rehoboth Bay and just East of Coastal Highway – you will see flood-zone boundary lines change so that you might now be located within a flood zone, or no longer located in a flood zone, or located in a flood zone of a different type or different “100-year storm” flood level. For a few the news is very bad (e.g., property location reclassified as being in a more dangerous flood zone), but for many it is good (e.g., reduction in the level of the 100-year flood at the property location). 

If you want to see how the proposed flood map changes will affect you go to the Sussex County flood information portal at Once at this site you can enter your property address. The mapping program will show your property in relationship to the current (effective) FIRM and the preliminary FIRM scheduled to be adopted on March 16, 2015.  You might then want to discuss these changes in flood zones with your flood insurance carrier.