Exposure Data and Information NOAA Office for Coastal Management coast.noaa.gov/digitalcoast/tools/flood-exposure.html The following data were used in the Coastal Flood Exposure Mapper and in map services available for use in ArcGIS Online or other online mapping platforms. See ESRI’s ArcGIS Online Tutorial for instructions on using map services. Hazards Exposure Authoritative Name Description Map Service Significance Source Spatial extents of multiple flood hazard data sets combined. Flood hazard data sets include high tide flooding, Federal Emergency Management Agency (FEMA) flood Provides a quick data (V zones, A zones, and 500- Coastal Coastal Flood visual Coastal Flood year zones treated as individual Flood Hazard Exposure assessment of Hazard layers), storm surge inundation for Composite Mapper areas most Composite category 1, 2, and 3 hurricanes Map Service prone to flood (from FEMA Hurricane Evacuation hazard events. Studies), sea level rise scenarios for 1, 2, and 3 feet above mean higher high water (MHHW), and tsunami run-up zones where available. Page 1 of 7 Authoritative Name Description Map Service Significance Source Areas that flood when coastal flood warning thresholds are exceeded. Derived from the flood frequency layer within the Sea Level Rise and Coastal Flooding Impacts Viewer. High Tide Sea Level Rise Areas subject to High Tide Flooding Viewer high tide Flooding For islands in the Caribbean and Map Service flooding. Pacific, the high tide flooding zones were mapped based on statistical analysis of water level observations at tidal stations in those areas. Digital FEMA flood data. The data represent the digital riverine and coastal flood zones available as of FEMA Flood FEMA’s Map FEMA Flood Areas at risk October 2017 and are a Zones Map Service Center Zones from flooding. combination of Digital Flood Service Insurance Rate Maps and Q3 flood data. Areas of near-worst-case storm surge flooding scenarios for coastal areas along the Gulf of Mexico, Continental U.S. Atlantic coasts, and select areas in the Caribbean National and Pacific islands. Data were Hurricane Areas at risk derived from storm surge Storm Surge Program Center Storm Surge from storm inundation maps created by the Map Service Storm Surge surge. National Hurricane Center Unit (NHC) Storm Surge Unit with the Sea, Lake, and Overland Surges from Hurricanes (SLOSH) model. Page 2 of 7 Authoritative Name Description Map Service Significance Source Sea level rise inundation scenarios ranging from zero to six feet above Sea Level Sea Level Rise Areas likely to mean higher high water (MHHW). Sea Level Rise Rise Map Viewer be inundated by Derived from data created for the Service sea level rise. Sea Level Rise and Coastal Flooding Impacts Viewer. National Areas likely to Tsunami Tsunami inundation zones modeled Tsunami Tsunami Hazard be inundated by Inundation for individual states and territories. Map Service Mitigation tsunamis. Program Societal Exposure Authoritative Name Description Map Service Significance Source The more people People per square mile based upon living in areas Population U.S. Census Population 2012-2016 American Community exposed to Density Map American Density Survey (ACS) 5-year estimates. hazards, the more Service Community Mapped to Census block groups. potential there is Survey for harm. People who are Percent of population living below living in poverty the poverty line based upon 2012- usually do not 2016 American Community Survey U.S. Census Poverty Map have adequate Poverty (ACS) 5-year estimates. Mapped to American Service resources to Census block groups. Mapped to Community prepare for or Census block groups. Read more on Survey respond to defining poverty. hazards. Page 3 of 7 Authoritative Name Description Map Service Significance Source Elderly may be more susceptible Percent of population age 64 or to hazard impacts older based upon 2012-2016 U.S. Census Elderly Map because they often Elderly American Community Survey (ACS) American Service have limited 5-year estimates. Mapped to Census Community mobility and block groups. Survey continual medical and care needs. Some of the most devastating disaster impacts to a community include the loss of income associated Number of employees within an with business area. Data from Bureau of Labor Bureau of interruption and Statistics (BLS) Quarterly Census of Employees Employees Labor the loss of jobs as Employment and Wages (QCEW). Map Service Statistics a result of business Mapped to 2010 Census block closures. It is also groups. important to know where people are located if a hazard event occurs during business hours. Page 4 of 7 Infrastructure Exposure Authoritative Name Description Map Service Significance Source Development classes extracted from 2011 Coastal Change Analysis Development Program land cover data, including near areas likely high intensity (80-100 percent to flood puts constructed materials), medium Coastal Change people in intensity (50-79 percent Development Analysis Development harm’s way and constructed materials), low Map Service Program Land can lead to intensity (21-49 percent Cover (C-CAP) costly constructed materials), and open infrastructure space (less than 20 percent repairs. constructed materials) development. Critical facilities are lifelines for Points representing the locations of the community hospitals, law enforcement and need to be facilities, schools, and fire or EMS Structures Data functional stations extracted from the U.S. Critical Set before, during, Critical Geological Survey (USGS) Structures Facilities and after an Facilities data set for The National Map. Map Service The National event because Map of the services Data from Structures database they provide published in March of 2018. (e.g. medical care, transportation.) Natural areas are often changed to Coastal Change developed Areas converted to development Development Development Analysis areas, and this classes between 1996 and 2011. Changes Changes Program Land creates more From C-CAP land cover change data. Map Service Cover (C-CAP) exposure to hazards, increasing vulnerabilities. Page 5 of 7 Ecosystem Exposure Authoritative Name Description Map Service Significance Source Pollution can be transferred Selection of facilities subject to during flood regulation. Downloaded from U.S. Pollution Facility events, Pollution Environmental Protection Agency’s Sources Map Registration impacting Sources Facility Registration Service (FRS) Service Service (FRS) natural areas database in 2018. and making them less resilient. Development classes extracted Development from 2011 Coastal Change Analysis adjacent to Program land cover data, including wetlands, high intensity (80-100 percent Coastal Change beaches and constructed materials), medium Analysis dunes, and intensity (50-79 percent Development Development Program Land other natural constructed materials), low Map Service Cover (C-CAP) areas and open intensity (21-49 percent space receives constructed materials), and open protection space (less than 20 percent benefits during constructed materials) flood events. development. Derived from 2011 C-CAP land cover data. Wetland classes include palustrine forested, palustrine scrub-shrub, palustrine emergent, Natural areas estuarine forested, estuarine scrub- and open shrub, and estuarine emergent spaces can be Natural Coastal Change Natural wetlands. Other natural areas and impacted Areas and Analysis Areas and open space include forest during flooding Open Space Program Land Open Space (deciduous, evergreen, mixed), events but can Map Service Cover (C-CAP) cultivated, pasture-hay, grassland, also provide and scrub-shrub classes. Beaches protection to and dunes were derived from communities. extracting bare land and unconsolidated shore classes adjacent to coastal open water. Page 6 of 7 Authoritative Name Description Map Service Significance Source Derived from the C-CAP Wetland Potential C-CAP Wetland Areas identified Potential Layer. The Wetland Wetland Potential Layer have the Potential Layer uses a combination Areas Map potential to be of wetland-related data and Service restored as modeling methods to determine wetlands and Wetland how likely an area is to be a provide Potential wetland or has the potential to protective become a wetland. services. Page 7 of 7 .