This data originates from San Francisco Bay Conservation and Development Commission's Adapting to Rising Tides Program which performed extensive modelling of expected sea level rise impact across the entire 9-county bay area. This data shows inundation from 66 inches of sea level rise combined with a 100-year storm event (equaling 108 inches of total water level)

The San Francisco Department of Public Health Flood Health Vulnerability Index is a composite index that measures the spatial distribution and relative vulnerability of San Francisco communities to the health impacts of flood inundation and extreme storms. The index is constructed using socioeconomic and demographic, exposure, health, and housing indicators and is intended to serve as a planning tool for health and climate adaptation. Steps for calculating the index can be found in in the "An Assessment of San Francisco’s Vulnerability to Flooding & Extreme Storms" located at https://sfclimatehealth.org/wp-content/uploads/2018/12/FloodVulnerabilityReport_v5.pdf.pdf

Data dictionary can be found in the attachments section of the metadata.