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Coastal Flood Risk Study

Coastal Flood Risk Study for Southeast Florida

In 2014, the Federal Emergency Management Agency (FEMA) issued updated digital Flood Insurance Rate Maps (FIRMs) and associated Flood Insurance Study reports for Broward County. However, the FEMA studies included analyses for rivers, streams, and creeks and did not include a coastal analyses.

The Federal Emergency Management Agency (FEMA) has begun a multi-year coastal analysis and mapping effort. Through the analysis and mapping effort, FEMA will better identify, assess, and communicate hazards and risks associated with coastal flooding in the Southeastern United States.

The coastal mapping effort began with FEMA’s Southeast Florida Coastal Study Discovery Meeting for Broward County which was held on June 25, 2014. A Technical Update Meeting for Broward County was held on May 11, 2016. FEMA’s Coastal Discovery Report​ contains compiled information and research and includes the plan of work for the updated flood hazard study for Southeast Florida. For further information visit Southeast Coastal Maps or contact your community’s Floodplain Manager.

FEMA’s coastal flood study in Southeast Florida will include:

  • Review of historical coastal flood events and dates to validate flood, wave and erosion analyses
  • Determination of the flood level with a 1 percent chance of being equaled or exceeded in any given year including the effects of tides, storm surges and waves
  • Designation of the Limit of Moderate Wave Action​, also known as Coastal A Zones.

One of the outcomes of the Coastal Flood Risk Study that may affect future construction requirements will be the designation of a new Coastal A Flood Zone. FEMA adopted a policy to identify these coastal areas that may be subject to moderate wave heights between 1.5 feet and 3 feet by delineating the limit of moderation wave action (LiMWA). The Florida Building Code defines these moderate wave height areas as Coastal A Zones. In accordance with the Florida Building Code new buildings, certain building additions and certain modifications to existing buildings within Coastal A Zones may be subject to new construction requirements.

View Broward County map​ highlighting the areas involved in the Coastal Flood Risk Study.​