About the SVI


*The Social Vulnerability Index (SVI) was developed by the Center for Disease Control (CDC) alongside the Agency for Toxic Substances and Disease Registry (ATSDR). The index looks at 14 different factors of social vulnerability on the census-tract level and analyzes them relative to the rest of the state.

These factors are categorized by theme (socioeconomic status, household composition, etc.) and are also grouped into an overall vulnerability index. Higher percentile values represent a higher level of vulnerability, and thus indicate populations at greater risk to hurricane scenarios. The symbol denotes those regions which fall into the 90th percentile and above (i.e. the top 10%) of social vulnerability within a given theme.

test 2 0-5000 people / sqmi +15000 people / sqmi

The circles are sized by population density and color scaled by the selected vulnerability index theme.



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