FEMA’s Methodology for Estimating Potential Losses from Disasters

Hazus is a nationally applicable standardized methodology that contains models for estimating potential losses from earthquakes, floods, hurricanes, and tsunamis. Hazus uses Geographic Information Systems (GIS) technology to estimate physical, economic, and social impacts of disasters. It graphically illustrates the limits of identified high-risk locations due to earthquakes, hurricanes, floods, and tsunamis. Users can then visualize the spatial relationships between populations and other more permanently fixed geographic assets or resources for the specific hazard being modeled, a crucial function in the pre-disaster planning process.

For more information about the Hazus program, please visit the Hazus home page. From there, you can learn how to:

Hazus 4.2 Service Pack 02 Release

Hazus 4.2 Service Pack 1 must be installed before Service Pack 2. Service Pack 2 for Hazus 4.2 was released on February 28, 2019. Download it here.

Significant enhancements are highlighted below:

  • Supports both a Level 1 and Advanced User option for the treatment of soil amplification with USGS probabilistic ground motion grids
  • The Advanced Engineering Building Module (AEBM) processing time is substantially optimized to support large (>1,000) record sets
  • The automated interface with USGS ShakeMap data is extended to include available USGS ShakeMap scenario earthquake events in addition to actual events
  • New thematic mapping is provided for ShakeMap ground motion data that both optimized drawing speed and aligns with the USGS official color ramps
  • User Data/Depth Grid quality assurance and format verification checks are provided. User tips and user-friendly messaging are provided if a depth grid fails to load
  • Study region aggregation times were optimized for the flood model when clipping agricultural features

Additionally, significant defect resolutions addressed include:

  • Failure to import depth grids no longer corrupts the study region
  • Facility functionality in earthquake model is corrected and provided based on a scale of 0-100% functional
  • Both AEBM and UDF have been optimized for probabilistic scenarios when user supplied soil maps are used
  • Total households without power or potable water estimates were corrected when results from more than one State are reported
  • A correction in the casualty code that can occasionally produce erroneously high commercial casualties was implemented
  • User modified and added custom depth damage functions have been validated to produce expected results
  • GeoProcessing (GP) option settings for the flood study region map templates were modified to address excessive map template save times after running hydrology and hydraulics
  • An error that resulted in reversed County names for St Croix and St Thomas in the Virgin Islands was corrected
  • A defect was fixed where the sum of damaged building counts pre- and post-NFIP exceeded total inventory building counts in cases of extreme flooding
  • The probabilistic hurricane scenario storm track is now mappable for each representative return period
  • County boundaries available in the Hurricane Table of Contents align with the County boundaries provided by the Hazus system files
  • Prevented deterministic scenario crashing while saving the storm tracks
  • Probabilistic hurricane wind field data for Alabama and Connecticut are now available in the Hurricane Table of Contents
  • Required hurricane state data files were restored in West Virginia reenabling Hazus Hurricane module loss assessment capabilities for the State
  • NULL values in State data for utility distribution line aggregated tract data for potable water, sewer and natural gas were replaced with 0's to correct an issue that produced erroneously high leak and break counts

Hazus 4.2 Service Pack 2 (Hazus 4.2.2) has the same hardware and software requirements as Hazus 4.2.

Service Pack 2 for Hazus 4.2 was distributed via the Hazus Auto-Update Patching tool.

There is no need for users to uninstall Hazus 4.2. However, Service Pack 2 requires that Service Pack 1 already be installed. If your secure network or firewall prevents the automatic download of the service pack, you can download using the link at the top of this section.

If you have questions regarding the service pack, please contact the Outreach Team at hazus-outreach@riskmapcds.com. For technical assistance or installation issues, please contact the Hazus Help Desk at hazus-support@riskmapcds.com.

Hazus 4.2 Service Pack 01 Release

Service Pack 01 for Hazus 4.2 was released on May 29, 2018. Download it here.

Specific enhancements include:

  • Integration of the Hazus Export Tool
  • The ability to incorporate USGS Vs30 Site Soil Characterization to the Earthquake module
  • A new view of buildings damaged by count to the Hurricane module
  • A new user-friendly interface for incorporating online DEM data in the Flood module
  • New capability to include user-defined facilities in the Hurricane module
  • Updates of all State databases based on 2018 valuations
  • New documentation for design upgrades, including case studies of recent performance and methodology changes

Additionally, defect resolutions addressed include:

  • Fixes to shelter parameters (Earthquake and Hurricane), and displaced households (Hurricane)
  • Waste water facilities mapping fix (Hurricane)
  • Severe losses no longer exceed exposure in coastal analysis (Flood)
  • Now able to assign damage functions to essential facilities (Flood)
  • When combining Earthquake and Tsunami, damage no longer underestimated for moderate seismic events
  • Fixes to the assignment of mapping schemes and building types to Essential Facilities (Hurricane)

The Florida Essential Facilities have been updated with data provided by the Florida Division of Emergency Management's (FDEM) GIS Unit that maintains a state-wide essential facility inventory including all reviewed and submitted facilities by each of the 67 Counties in the State. Metadata are available here: http://geodata.floridadisaster.org

Hazus 4.2 Service Pack 01 has the same hardware and software requirements as Hazus 4.2.

Service Pack 01 for Hazus 4.2 was distributed via the Hazus Auto-Update Patching tool.

There is no need for users uninstall Hazus 4.2. If your secure network or firewall prevents the automatic download of the service pack, you can download below.

If you have questions regarding the service pack, please contact the Outreach Team at hazus-outreach@riskmapcds.com. For technical assistance or installation issues, please contact the Hazus Help Desk at hazus-support@riskmapcds.com.

Download Hazus

Users may select the "Hazus Application" link below to download the latest version of the software. As an alternative, you may opt to manage the download and select the items you wish to obtain.

Hazus 4.2 and above must be installed with ArcGIS 10.5.1.

NOTE: For new, FULL Hazus installations, you must uninstall any existing versions of Hazus and all Microsoft SQL components from your computer before downloading and ensure that you have ArcGIS 10.5.1 on your computer. As a result of the datum update with Hazus 4.2, any older existing State databases must be replaced with the new State data below.

Users wishing to preserve their study regions and transfer them to Hazus 4.2 and above may do so. They will be able to follow the steps outlined in the Getting Started Guide available with the download to extract their study regions in Hazus 4.0 and then upload them into 4.2 once it is downloaded. In addition, each Service Pack release will update any existing study regions. For questions or issues, feel free to contact the Hazus Help Desk at hazus-support@riskmapcds.com.

For the Tsunami Module, users must supply their own hazard data for analysis. To assist in preparing this data, the Hazus Team has provided five case study datasets for users, which are available at the bottom of this page for download through a zip file. Users can model their own datasets after these samples.

If you require assistance downloading the software, please email the FEMA Map Information eXchange (FMIX) at FEMAMapSpecialist@riskmapcds.com.

The release of Hazus 4.2 Service Pack 02 has made updates to the below datasets. The entire US state dataset and individual state datasets, which have now been updated to reflect Census 2010 data, are available for download below.

State Direct Download Managed Download
Alabama DL:Direct Download Hazus Alabama dataset
Alaska DL:Direct Download Hazus Alaska dataset
Arizona DL:Direct Download Hazus Arizona dataset
Arkansas DL:Direct Download Hazus Arkansas dataset
American Samoa DL:Direct Download Hazus American Samoa dataset
California DL:Direct Download Hazus California dataset
Colorado DL:Direct Download Hazus Colorado dataset
Connecticut DL:Direct Download Hazus Connecticut dataset
Delaware DL:Direct Download Hazus Delaware dataset
District of Columbia DL:Direct Download Hazus District of Columbia dataset
Florida DL:Direct Download Hazus Florida dataset
Georgia DL:Direct Download Hazus Georgia dataset
Guam DL:Direct Download Hazus Guam dataset
Hawaii DL:Direct Download Hazus Hawaii dataset
Idaho DL:Direct Download Hazus Idaho dataset
Illinois DL:Direct Download Hazus Illinois dataset
Indiana DL:Direct Download Hazus Indiana dataset
Iowa DL:Direct Download Hazus Iowa dataset
Kansas DL:Direct Download Hazus Kansas dataset
Kentucky DL:Direct Download Hazus Kentucky dataset
Louisiana DL:Direct Download Hazus Louisiana dataset
Maine DL:Direct Download Hazus Maine dataset
Northern Mariana Islands DL:Direct Download Hazus Northern Mariana Islands dataset
Maryland DL:Direct Download Hazus Maryland dataset
Massachusetts DL:Direct Download Hazus Massachusetts dataset
Michigan DL:Direct Download Hazus Michigan dataset
Minnesota DL:Direct Download Hazus Minnesota dataset
Mississippi DL:Direct Download Hazus Mississippi dataset
Missouri DL:Direct Download Hazus Missouri dataset
Montana DL:Direct Download Hazus Montana dataset
Nebraska DL:Direct Download Hazus Nebraska dataset
Nevada DL:Direct Download Hazus Nevada dataset
New Hampshire DL:Direct Download Hazus New Hampshire dataset
New Jersey DL:Direct Download Hazus New Jersey dataset
New Mexico DL:Direct Download Hazus New Mexico dataset
New York DL:Direct Download Hazus New York dataset
North Carolina DL:Direct Download Hazus North Carolina dataset
North Dakota DL:Direct Download Hazus North Dakota dataset
Ohio DL:Direct Download Hazus Ohio dataset
Oklahoma DL:Direct Download Hazus Oklahoma dataset
Oregon DL:Direct Download Hazus Oregon dataset
Pennsylvania DL:Direct Download Hazus Pennsylvania dataset
Puerto Rico DL:Direct Download Hazus Puerto Rico dataset
Rhode Island DL:Direct Download Hazus Rhode Island dataset
South Carolina DL:Direct Download Hazus South Carolina dataset
South Dakota DL:Direct Download Hazus South Dakota dataset
Tennessee DL:Direct Download Hazus Tennessee dataset
Texas DL:Direct Download Hazus Texas dataset
Utah DL:Direct Download Hazus Utah dataset
Vermont DL:Direct Download Hazus Vermont dataset
Virginia DL:Direct Download Hazus Virginia dataset
U.S. Virgin Islands DL:Direct Download Hazus U.S. Virgin Islands dataset
Washington DL:Direct Download Hazus Washington dataset
West Virginia DL:Direct Download Hazus West Virginia dataset
Wisconsin DL:Direct Download Hazus Wisconsin dataset
Wyoming DL:Direct Download Hazus Wyoming dataset
All States Part 1 (AL to MO) DL:Direct Download Hazus All States Part 1 (AL to MO) dataset
All States Part 2 (MT to WY) DL:Direct Download Hazus All States Part 2 (MT to WY) dataset

The Hazus Tsunami model requires users to upload their own data to run the Tsunami hazard. Hazus was designed to use adapted formats based on those used by NOAA's Pacific Marine Environmental Laboratory (PMEL) and specifically their Short-term Inundation Forecast for Tsunami (SIFT) product. This folder contains sample Tsunami hazard data from PMEL SIFT for five localities: Crescent City, CA; Garibaldi, OR; Homer, AK; Kahului, HI; and Westport, WA. Each state folder contains Tsunami hazard input data required for Level 1, Level 2, and Level 3 analysis in Hazus. These files have been tested and will run in Hazus, or can be used as templates in preparing your own local Tsunami hazard data. For more information on PMEL SIFT data and the data requirements for each level of Hazus Tsunami analysis, please see the Hazus 4.0 Release Notes. Download the sample data here.

Additional Resources