FEMA Flood Map Service Center: Hazus
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, and hurricanes. 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 earthquake, hurricane and floods. 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:
- Stay connected with the Hazus Community by joining your local Hazus User Group
- Sign up for Hazus Training from FEMA's Emergency Management Institute
- Find technical support at the Hazus Help Desk
Hazus 4.2 Release
On January 29, 2018, the Hazus Team deployed release 4.2. This release is a full-versioned software release with a number of key highlights, including:
- Hazus 4.2 is now compatible with ArcGIS 10.5.1
- Major processing time reductions for hydrology and hydraulics within level 1 flood.
- Additional supported formats for level 2 flood depth grid import
- High resolution ShakeMaps now compatible, with faster import times
- Restoration of the Fire Following Earthquake (FFE) module
- Improvements to the Comprehensive Data Management System (CDMS) for easier import of user data
A patch is now available for the Hazus 4.0 Hurricane Wind model, fixing two defects: underestimation of losses for manufactured housing, and overestimation of losses for large and medium hospital facilities. Click HERE to download the patch. To install the patch, follow these steps:
- Download the patch and unzip to your local machine in the C:\ProgramFiles(x86)\Hazus folder
- Navigate to the folder where the patch was unzipped. The extracted files will be in a folder called "HuPatch_v2." Please note, some extractors will create a second subfolder with the same name, and the patch files will be located there.
- Open the folder HuPatch_v2 which contains the patch files.
- Double-click on the executable file called HuPatch40SP1 to launch the patch. A message will display when the patch installation has successfully completed.
Please note: If Hazus is not installed in C:\ProgramFiles(x86)\Hazus, or is only a partial install, a message will display that Hazus cannot be found on the machine. If this occurs, please contact the Hazus Help Desk for assistance in deploying the patch.
Domestic and international users may select the "Hazus Application" link below to download the software. As an alternative, you may opt to manage the download and select the items you wish to obtain. Internet Explorer and Mozilla Firefox web browsers are recommended to perform the download. Google Chrome is not supported. Hazus 4.2 must be installed with ArcGIS 10.5.1.
NOTE: 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, any existing State databases need to be replaced with the new State data below.
Users wishing to preserve their study regions and transfer them to Hazus 4.2 may do so, but only if they are operating on the most recent version of Hazus (4.0). 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. For questions or issues, feel free to contact the Hazus Help Desk at email@example.com.
For the Tsunami Module, users must supply their own 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.