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Climate Change and Health Vulnerability Indicators for California

Indicators, data, and narratives to assess exposures, social vulnerability and adaptive capacity


​The CDPH Climate Change and Health Equity (CCHE) Branch​ developed climate change and health indicators, narratives, and data to provide local health departments and partners tools to better understand the people and places in their jurisdictions that are more susceptible to adverse health impacts associated with climate change, specifically extreme heat, wildfire, sea level rise, drought, and poor air quality. The assessment data can be used to screen and prioritize where to focus deeper analysis and plan for public health actions to increase resilience.



View the CCHVIz interactive data visualization platform for the Climate Change and Health Vulnerability Indicators:​

Screenshot of CCHVIz Data Visualization Tool

Climate Change and Health Vulnerability Assessment Framework

Vulnerability assessments are a key tool to begin to prepare and plan for resilience to climate change and health impacts. A climate change and health vulnerability assessment helps to identify where a person’s or neighborhood’s susceptibilities to injury or disease exist due to their distance and sensitivity to climate-related environmental exposures or hazards. Adaptive capacity can offset the potential for injury and disease from exposure and sensitivity to hazards associated with climate change. Understanding more about neighborhoods and populations with multiple or complex social vulnerabilities can improve prioritization of efforts, inclusive planning, communication, and evaluation of adaptation and interventions developed to protect communities from the effects of climate change. The suite of domains and indicators focus on assessing current and future climate change exposures (such as wildfires, extreme heat, air pollution, sea level rise, and drought), the people and places most susceptible to health risks from climate exposures, and the capacity to adapt to a changing climate. Also see: the Climate Change and Health Profile reports, the CCHE CalBRACE Project page, and the CCHE Resources & Tools page​ for more information on adaptation planning for climate change and public health.

Climate Change & Health Vulnerability Data and Indicators

The CDPH Climate Change and Health Equity Branch​ produced climate change and health vulnerability indicators for download using the links below. Each indicator includes the data in an Excel file as well as a narrative in PDF format. Each narrative describes the indicator’s significance to climate change and health, the evidence that links the indicator to health outcomes, data sources, bibliographic references, methodology, and limitations that impact the interpretation of the indicator. Examples of maps, charts, and tables are also included. We invite you to download the data and narrative files and use them to create maps, charts, and tables of your own counties and communities.

The most up to date climate change data for California can be viewed and downloaded from

The indicators are organized in three domains: Environmental Exposures, Population Sensitivity and Adaptive Capacity.

Environmental Exposures Domain

Environmental exposure refers to the magnitude, frequency, and duration of an environmental exposure or disease risk.

Indicator Short NameIndicator DefinitionExcel Data​Narrative
Extreme Heat DaysProjected number of extreme heat days​extreme heat data (XLSX)
Revised October 2018
extreme heat narrative (PDF)
Revised February 2019
Air Quality (PM2.5)Three-year annual mean concentration of particulate matter (PM2.5)PM2.5 data (XLSX)
Revised October 2018
PM2.5 narrative (PDF)
Revised November 2018
Air Quality (Ozone)Three-year average daily maximum ozone concentrationozone data (XLSX)
Revised October 2018
ozone narrative (PDF)
Revised November 2018
DroughtPalmer Drought Severity Index drought datadrought narrative (PDF)
WildfiresPercent of population currently living in high fire risk hazard zonewildfire data (XLSX)wildfire narrative (PDF)
Sea Level RisePercent of population living in 100-year flood zone and 55 inches of sea level risesea level rise data (XLSX)sea level rise narrative (PDF)​


​Population Sensitivity Domain

Sensitivity refers to the physiological and socio-economic factors which directly or indirectly affect the degree to which a population is impacted by climate-related changes.

Indicator Short Name

Indicator DefinitionExcel DataNarrative
Children Percent of population aged less than 5 yearschildren data (XLSX)
Revised September 2018
children narrative (PDF)
Revised February 2019
ElderlyPercent of population aged 65 years or olderelderly data (XLSX)
Revised October 2018
elderly narrative (PDF)
Revised February 2019
PovertyPercent of population whose income in the past year was below poverty levelpoverty data (XLSX, 6.6MB)
Revised March 2019
poverty narrative (PDF)
Revised April 2019
EducationPercent of population aged >=25 years with less than a four-year college educational attainmenteducation data (XLSX, 9.2MB) 
Revised June 2018
education narrative (PDF)
Race and EthnicityPercent of population of colorrace & ethnicity data (XLSX)
Revised October 2018
race & ethnicity narrative  (PDF)
Revised February 2019
Outdoor WorkersPercent of population employed and aged >=16 years working outdoorsoutdoor workers data (XLSX)
Revised October 2018
outdoor workers narrative (PDF)
Revised April 2020
Vehicle OwnershipPercent of occupied households with no vehicle ownershipvehicle ownership data (XLSX)
Revised October 2018
vehicle ownership narrative
Revised June 2019
Linguistic IsolationPercent of households with no one aged >=14 years speaking Englishlinguistic isolation data (XLSX)
Revised October 2018
linguistic isolation narrative (PDF)
Revised June 2019
Physical and Mental Disability

Percent of population living with physical disability

Percent of population living with mental disability

disability data (XLSX)
Revised October 2018
disability narrative (PDF)
Revised June 2019
Health InsurancePercent of population without health insurancehealth insurance data (XLSX)
Revised October 2018
health insurance narrative (PDF)
Revised April 2020
Violent Crime RateNumber of violent crimes per 1,000 residentsviolent crime data (XLSX)violent crime narrative (PDF)​

Adaptive Capacity Domain

Adaptive capacity refers to the broad range of responses and adjustments to the impacts of climate change, including the capacity to moderate potential damages, take advantage of opportunities, and cope with the consequences.

Indicator Short​ Name​Indicator DefinitionExcel DataNarrative
Air ConditioningPercent of households without air conditioningair conditioning data (XLSX)air conditioning narrative (PDF)
Tree CanopyPercent of area not covered by tree canopytree canopy data (XLSX)tree canopy narrative (PDF)
Impervious SurfacesPercent of area covered by impervious surfacesimpervious surfaces data (XLSX)
Revised September 2019
impervious surfaces narrative (PDF)
Revised September 2019
Public Transit AccessPercent of population not residing within 0.5 mile of bus/ferry/ferry stop with <15 minutes waiting time during peak commute hourspublic transit access datapublic transit access narrative (PDF)​


Data and Indicators:  Excel files with data for California, its counties, cities, towns, and census tracts (depending on availability) and narratives in PDF files for each indicator.

The CDPH Climate Change and Health Equity Branch developed the Climate Change and Health Vulnerability Indicators utilizing the same methods used by the Healthy Communities Data and Indicators Project (HCI). For technical assistance and questions regarding the Climate Change and Health Vulnerability Indicators, please contact


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