Climate and Health: Vulnerability Indices
Analysis of 60 years of weather data by the Wisconsin Initiative on Climate Change Impacts (WICCI) indicates that Wisconsin has become warmer. Across the upper Midwest, temperatures were notably high in 2012. Extreme heat is known to have negative impacts (related to death and illness) on human health. Extreme heat can disproportionately affect vulnerable populations such as elderly populations, socially isolated people, and those with pre-existing chronic conditions such as cardiovascular disease. These risk factors allow us to pinpoint the vulnerable populations in our community.
This project used existing population and census data, natural and built environment data, and health factors data to create a heat vulnerability index (HVI) to identify areas of greatest risk for negative health impacts due to extreme heat in the entire state of Wisconsin and the greater Milwaukee urban area. Listed below are the specific indicators that were used in the analysis. The maps can help identify high-risk neighborhoods and populations to receive targeted messaging related to heat events and additional resources during extreme heat events.
For more detailed information and analysis, view our reports on the Wisconsin Heat Vulnerability Index, P-00882 (PDF) and the Milwaukee Heat Vulnerability Index, P-00882a (PDF)
County-specific HVI maps and Tribe-specific HVI maps exist for all counties in Wisconsin.
Indicators included in the Wisconsin Heat Vulnerability Index
Using methodology developed by the San Francisco Department of Public Health, the Wisconsin Building Resilience Against Climate Effects (BRACE) staff conducted a geo-spatial analysis of heat-related vulnerability in both Wisconsin as a whole and the greater Milwaukee urban area, with assistance from the Wisconsin Department of Health Services (DHS) Bureau of Information Technology Services.
Further analysis that helped identify how different indicators affected the analysis included separating out each of the four categories of indicators: population density, health factors, natural and built environment, and demographic and socioeconomic factors.
- Population per square mile
- Diabetes prevalence*
- Adult asthma prevalence*
- Hypertension rate*
- Percentage of population obese (BMI)*
- Percentage uninsured*
- Percentage of population receiving public substance abuse services*
- Percentage of population receiving public mental health services
- Percentage of population that visited an emergency department for heat stress
- Percentage of households in poverty
- Percentage of population aged 0-4
- Percentage of population aged 85+
- Percentage of population living alone
- Percentage of population 65+ living alone
- Percentage of non-white population
- Percentage of population with less than high school education
- July 6, 2012 temperature (hottest day of 2012)
- July 2012, average PM 2.5 concentration (ug/m3)
- July 2012, maximum recorded ozone level (ppb)
- Percentage of households without a vehicle
- Medium- and high-density land cover classification
- Nursing home bed count
* Indicators used only in the statewide HVI map.
County HVI Maps
County-specific heat vulnerability index (HVI) maps were created for the entire state of Wisconsin. The data displayed in the maps are meant to serve as an informational tool to better understand the spatial distribution of human populations most vulnerable to extreme heat-related events.
The county-specific maps are based on the statewide Wisconsin Heat Vulnerability Index, but have a reduced number of health-related indicators. Each county map is representative of that county, and is not comparable to maps for other counties in Wisconsin.
Adams County (PDF)
- Indicator Map (PDF)
Ashland County (PDF)
- Indicator Map (PDF)
Barron County (PDF)
- Indicator Map (PDF)
Bayfield County (PDF)
- Indicator Map (PDF)
Brown County (PDF)
- Indicator Map (PDF)
Buffalo County (PDF)
- Indicator Map (PDF)
Burnett County (PDF)
- Indicator Map (PDF)
Calumet County (PDF)
- Indicator Map (PDF)
Chippewa County (PDF)
- Indicator Map (PDF)
Clark County (PDF)
- Indicator Map (PDF)
Columbia County (PDF)
- Indicator Map (PDF)
Crawford County (PDF)
- Indicator Map (PDF)
Dane County (PDF)
- Indicator Map (PDF,)
Dodge County (PDF)
- Indicator Map (PDF)
Door County (PDF)
- Indicator Map (PDF)
Douglas County (PDF)
- Indicator Map (PDF)
Dunn County (PDF)
- Indicator Map (PDF)
Eau Claire County (PDF)
- Indicator Map (PDF)
Florence County (PDF)
- Indicator Map (PDF)
Fond du Lac County (PDF)
- Indicator Map (PDF)
Forest County (PDF)
- Indicator Map (PDF)
Grant County (PDF)
- Indicator Map (PDF)
Green County (PDF)
- Indicator Map (PDF)
Green Lake County (PDF)
- Indicator Map (PDF)
Iowa County (PDF)
- Indicator Map (PDF)
Iron County (PDF)
- Indicator Map (PDF)
Jackson County (PDF)
- Indicator Map (PDF)
Jefferson County (PDF)
- Indicator Map (PDF)
Juneau County (PDF)
- Indicator Map (PDF)
Kenosha County (PDF)
- Indicator Map (PDF)
Kewaunee County (PDF)
- Indicator Map (PDF)
La Crosse County (PDF)
- Indicator Map (PDF)
Lafayette County (PDF)
- Indicator Map (PDF)
Lincoln County (PDF)
- Indicator Map (PDF)
Langlade County (PDF)
- Indicator Map (PDF)
Manitowoc County (PDF)
- Indicator Map (PDF)
Marathon County (PDF)
- Indicator Map (PDF)
Marinette County (PDF)
- Indicator Map (PDF)
Marquette County (PDF)
- Indicator Map (PDF)
Menominee County (PDF)
- Indicator Map (PDF)
Milwaukee County (PDF)
- Indicator Map (PDF)
Monroe County (PDF)
- Indicator Map (PDF)
Oconto County (PDF)
- Indicator Map (PDF)
Oneida County (PDF)
- Indicator Map (PDF)
Outagamie County (PDF)
- Indicator Map (PDF)
Ozaukee County (PDF)
- Indicator Map (PDF)
Pepin County (PDF)
- Indicator Map (PDF)
Pierce County (PDF)
- Indicator Map (PDF)
Polk County (PDF)
- Indicator Map (PDF)
Portage County (PDF)
- Indicator Map (PDF)
Price County (PDF)
- Indicator Map (PDF)
Racine County (PDF)
- Indicator Map (PDF)
Richland County (PDF)
- Indicator Map (PDF)
Rock County (PDF)
- Indicator Map (PDF)
Rusk County (PDF)
- Indicator Map (PDF)
Saint Croix County (PDF)
- Indicator Map (PDF)
Sauk County (PDF)
- Indicator Map (PDF)
Sawyer County (PDF)
- Indicator Map (PDF)
Shawano County (PDF)
- Indicator Map (PDF)
Sheboygan County (PDF)
- Indicator Map (PDF)
Taylor County (PDF)
- Indicator Map (PDF)
Trempealeau County (PDF)
- Indicator Map (PDF)
Vernon County (PDF)
- Indicator Map (PDF)
Vilas County (PDF)
- Indicator Map (PDF)
Walworth County (PDF)
- Indicator Map (PDF)
Washburn County (PDF)
- Indicator Map (PDF)
Washington County (PDF)
- Indicator Map (PDF)
Waukesha County (PDF)
- Indicator Map (PDF)
Waupaca County (PDF)
- Indicator Map (PDF)
Waushara County (PDF)
- Indicator Map (PDF)
Winnebago County (PDF)
- Indicator Map (PDF)
Wood County (PDF)
- Indicator Map (PDF)
Tribal HVI Maps
Tribe-specific heat vulnerability index (HVI) maps were created for the entire state of Wisconsin. The data displayed in the maps are meant to serve as an informational tool to better understand the spatial distribution of human populations most vulnerable to extreme heat-related events.
The tribe-specific maps are based on the statewide Wisconsin Heat Vulnerability Index, but have a reduced number of health-related indicators. Each tribe-specific map is representative of that tribe, and is not comparable to maps for other tribes in Wisconsin.
Menominee Indian Tribe of Wisconsin (PDF)
- Indicator Map (PDF)
Oneida Tribe of Indians of Wisconsin (PDF)
- Indicator Map (PDF)
Sokaogon Chippewa Community (PDF)
- Indicator Map (PDF)
St. Croix Chippewa Indians of Wisconsin (PDF)
- Indicator Map (PDF)
Stockbridge-Munsee Community (PDF)
- Indicator Map (PDF)
If you have a question or didn't find what you're looking for, email us or give us a call at 608-266-6761.