The City of Key West, Florida

The Southernmost City in the Continental United States


"Draft" Flood Maps (now Preliminary Flood Maps)

UPDATE December 30, 2019 - "Preliminary" Flood Maps & SOMA

FEMA released:

  • Preliminary Flood Maps
    • No major differences were noted with the Draft flood maps released during August.
  • Preliminary SOMA (Summary of Map Actions)
    • This is a list of map changes currently in effect that will likely be extinguished when the new flood maps become effective. As expected, all most all existing map changes (LOMAs & LOMRs) will be rescinded when the new maps take effect. 

Update (9/19/19) : LiMAW a/k/a New Coastal A Zones Added

Added layer showing new FEMA flood zone type, the Coastal Flood Zone. 

This will be a regulatory boundary line. Buildings on the seaward side - or touched by - this line, will need to adhear to the higher VE-zone construction standards.

Example Coastal A type flood zone Key West Bight

Update (8/26/19) : New Impact Map Added

To better show the actual proposed difference in elevations - explained below in more detail - a "New Flood Level Impacts" layer has been added to this map.

Each building in the City is color coded to show the number of feet difference between current and proposed flood maps. 


Legend Draft Flood Maps Impact Layer

Preliminary Flood Maps: 

FEMA has released "preliminary" new flood maps. These maps aren't yet in effect. 

The final flood maps wouldn't likely become effective until the spring of 2021 at the earliest. In the meantime, City officials will be closely analyzing its options.

  • IMPORTANT: These maps don't show an additional difference in elevation due to a change in mapping standards between the old and new proposed flood maps (datum NGVD29-> NAVD88 = -1.342f).
    • To account for this change, add +one-foot to any apparent increase.
      • For example: If your building was in an AE-8 flood zone and is still shown in an AE-8 zone, then it actually experienced an increase of one-foot.
      • Another example: If your building was in an AE-6 flood zone and is proposed to be in an AE-9 zone, the increase appears to be three-feet.  However, the actual increase would be four-feet. 
      • Previous X-Zone Buildings: Structures removed from the X-zones didn't previously have a flood level associated with them, so this mapping standard difference wouldn't be relevant. 
      • Note: To compare Elevation Certificate measurements, subtract -1.34-ft. (All existing ECs were measured to the NGVD-29 datum.)

View Online Preliminary Flood Maps

Contact Us

Scott Fraser,
FEMA Coordinator

In this Department

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