Vulnerability to Tornadoes

Texas Hazard Mitigation Package (THMP)

 

 

Data Layer:
Population Vulnerability: Tornadoes
Content:
Total population and population density vulnerability to tornadoes according to county in Texas.

Two map choices:

Total Population Vulnerability to Tornadoes

Population Density Vulnerability to Tornadoes

In Map 1, counties are categorized into 5 classes of Population Vulnerability to Tornadoes using the natural breaks method.

In Map 2, counties are categorized into 5 classes of Population Density Vulnerability to Tornadoes using the quantile method.

Values are categorized from High to Low.
Use Notes:

Assists in determining relative vulnerability of the population to this type of hazard.

Note: It is not a measure of extent of potential damage. It is a measure that combines exposure with risk to reveal where higher and lower vulnerability areas are relative to other areas. For a more detailed and qualitative analysis of Vulnerability, HAZUS is recommended.

Direct statewide download of this data layer.
User options for downloading this data layer or others by county (or statewide), use the Download Utility
Source:

Data layer was compiled internally, using data tornado risk zones from FEMA / Storms & Tornado Shelters.

FEMA / Storms & Tornado Shelters
www.shelters-of-texas.com/risk.html

Population data was compiled from the U.S. Census Bureau and Texas State Data Center.

U.S. Census Bureau
www.census.gov/geo/www/tiger/

Texas State Data Center
txsdc.utsa.edu

 

Data Layer:
Property Value Vulnerability: Tornadoes
Content:
Total property value and property value density vulnerability to tornadoes according to county in Texas.

Two map choices:

Total Property Value Vulnerability to Tornadoes

Property Value Density Vulnerability to Tornadoes

In Map 1, counties are categorized into 5 classes of Property Value Vulnerability to Tornadoes using the natural breaks method.

In Map 2, counties are categorized into 5 classes of Property Value Density Vulnerability to Tornadoes using the quantile method.

Values are categorized from High to Low.
Use Notes:

Assists in determining relative vulnerability of the value of property to this type of hazard.

Note: It is not a measure of extent of potential damage. It is a measure that combines exposure with risk to reveal where higher and lower vulnerability areas are relative to other areas. For a more detailed and qualitative analysis of Vulnerability, HAZUS is recommend.

Property Value includes the building and contents (not the land)

Direct statewide download of this data layer.
User options for downloading this data layer or others by county (or statewide), use the Download Utility
Source:

Data layer was compiled internally, using data tornado risk zones from FEMA / Storms & Tornado Shelters.

FEMA / Storms & Tornado Shelters
www.shelters-of-texas.com/risk.html

Property value data was compiled internally, using data from FEMA’s HAZUS-MH General Building Stock inventory database.

FEMA / HAZUS-MH:
http://www.fema.gov/plan/prevent/hazus

U.S. Census Bureau
www.census.gov/geo/www/tiger/

Dun & Bradstreet
http://www.dnb.com/us/

RS Means
http://www.rsmeans.com/

 

OTHER HAZARD INFO

NOAA - Risk and Vulnerability Assessment Tool (RVAT)
http://www.csc.noaa.gov/rvat/

Note: This site only includes a study of a couple of counties in Florida on its Interactive Map Viewer.

It also includes a link to a Community Vulnerability Assessment Tool (CVAT) for a case study for New Handover County, NC.

The CVAT site has an online tutorial explaining the process of vulnerability assessments to hazards (click on Vulnerability Assessment Tutorial)

Also on the CVAT CD which can be ordered at the site there is a useful Damage Assessment Tool, which can be used for any case study.