Flood Risks and Floodplain Mapping


While the floodplain data that is shown on the map is the same, this map is not an official FEMA Digital Flood Insurance Rate Map (DFIRM). This Interactive Mapping Tool is not intended for insurance rating purposes and is for information only. The positional accuracy may be compromised in some areas. The map is not 100% accurate in locating your address. Please contact the City's floodplain administrator for more information or to view an official copy of the Flood Insurance Rate Maps.

Please see the FEMA Flood Map Service Center for access to download digital data that was used to prepare these interactive mapping tools. Under the "Search All Products" link, query "GALVESTON, CITY OF" under the search option "Jurisdiction Name."

Compare the effective flood map that is currently in place for the island to the preliminary revised proposed flood map here: Effective and Preliminary Revised Floodmap Comparison

Effective Flood Map
(December 6, 2002)

View in Full Screen

View in Google Earth

Preliminary Revised Flood Map
(February 28, 2018)
View in Full Screen

Other Resources:

BEG Shoreline Change Map - an interactive map prepared by the Bureau of Economic Geology that illustrates trends in shoreline change along the Texas Gulf Coast, from the 1930's to 2012. A link to the full report of the study can be found here (link).

National Wetlands Inventory - an interactive map prepared by the U.S. Fish and Wildlife Service of wetland resources in the United States.

National Storm Surge Hazards Maps - depiction of possible storm surge flooding vulnerability along the U.S. coast, from Texas to Maine. Maps prepared by the National Oceanic and Atmospheric Administration.

Galveston's Bulwark Against the Sea - report on the history of the Galveston Seawall, prepared by the U.S. Army Corps of Engineers in 1981.