FEMA Flood Map Service Center: Hazus
FEMA’s GIS Software and Data for Estimating Potential Losses from Disasters
Hazus is FEMA’s nationally standardized risk assessment tool, offering advanced methodologies for estimating potential losses from natural disasters such as floods, hurricanes, earthquakes, and tsunamis. Designed using Geographic Information Systems (GIS) technology, Hazus provides the tools and data necessary to determine important insights for disaster planning, mitigation, and emergency response.
For more information about the Hazus program, please visit the Hazus home page.
Latest Release: Hazus 7.0
Hazus 7.0 is now available and represents a major upgrade, including:
- Integration with ArcGIS Pro, providing users with advanced GIS capabilities, an improved user interface, and modern tools for hazard analysis.
- Simplified workflows for flood and hurricane models.
- Improved flood module methodologies by implementing a depth limited approach for coastal flood zone designation.
- More flexible average annualized loss (AAL) calculation for flood analyses by allowing users to leverage any 3 or more multi-return period depth grids.
Hazus 7.0 marks a major milestone as the first of many releases in ArcGIS Pro.
While some features from Hazus 6.1 on ArcMap may not yet be available, we're actively working to integrate key functionalities into future releases. We are committed to providing the risk assessment community with accessible, reliable tools that meet your evolving needs.
Join us on this journey as we strive to deliver the best possible natural hazard risk assessment software and stay informed about the latest developments by signing up for our email updates.
Steps to use Hazus 7.0
- Download Hazus 7.0: Download and extract the "HazusPro_App" media and save it to a known file location.
- Review Release Guides: Open and read the "Hazus 7.0 Getting Started Guide" to install and run Hazus. The "Hazus 7.0 Release Notes" are available for more detailed information.
Access to Inventory Data
With Hazus 7.0, we’ve made it easier to get started by taking care of all the back-end database setup. All you need to do is open Hazus and begin using the software. There is no longer a need for users to manually download and extract Hazus databases, like in previous releases.
For users interested in exploring Hazus inventory data without running the software, the Hazus Inventory National Database is available. This dataset compiles all baseline inventory data for the continental United States, Alaska, Hawaii, and U.S. Territories into a single, easily accessible file. Download the data here.
What’s the Difference between Hazus 7.0 and Hazus 6.1?
Hazus 6.1 was built as an extension of ArcMap, which is in Mature Support. More information can be found here.
Hazus 7.0 is built as an extension of ArcGIS Pro. A table covering the general functionalities available in both is below.
For detailed information about what is available in Hazus 6.1 and Hazus 7.0 please refer to the release notes available with each download, or contact the Hazus Help Desk if you have additional questions.
General Functionality Available in Hazus 6.1 and Hazus 7.0
| Feature | Hazus 6.1 | Hazus 7.0 |
|---|---|---|
| Software Compatibility | ArcMap Desktop v10.8.2 | ArcGIS Pro v3.2 or v3.3 |
| Hurricane Analysis | Available; Requires the Hazus open-source Hurricane Hazard Import Tool (HHIT) for HURREVAC analysis | Available only for HURREVAC analysis (in software) |
| Flood Analysis | Available to users with or without hazard data | Available to users with hazard data (i.e., flood inundation depth grids) |
| Average Annualized Loss (AAL) | Available for earthquake, flood, and hurricane models | Available only for the flood model, specifically for users with hazard data (i.e., any 3 or more multi-return period depth grids) |
| Probabilistic Analysis | Available for earthquake, flood, and hurricane models | Available only for the flood model, specifically for users with hazard data (i.e., depth grids representing flood probability intervals) |
| Earthquake Analysis | Available | Not yet available |
| Tsunami Analysis | Available | Not yet available |
| Flood Depth Grid Creation | Available | Not yet available |
| Reports | Available | Not yet available |
Download and Install Hazus 6.1 (for ArcMap)
Since Hazus 7.0 does not have all the features currently available in Hazus 6.1 today, we will continue to support this version until it is no longer permitted.
Hazus 6.1 software and state datasets are available free of charge below.
For additional guidance, watch our videos on how to download and install Hazus. If you need technical support, please contact the Hazus Help Desk.
May 2025 Update: The program released an updated version of the Puerto Rico (PR) state database to correct wrongly assigned information of seismic design levels. This misattributed information caused difficulties in estimating construction age which led to an underestimation of projected losses for earthquake scenarios in PR. The updated version is now available for download.
Hazus 6.1 Installation Instructions:
- Make sure your system meets the system requirements listed in the graphic below. This includes installing ArcGIS Desktop 10.8.2 and enabling your license and spatial analyst extension.
- Uninstall all existing versions of Hazus using the "Hazus 6.1 Uninstallation Guide" available with the "Hazus_App" media download.
- Download the Hazus 6.1 and follow the installation steps in the "Hazus 6.1 Installation and Testing Guide". For additional information, check out our Hazus: Getting Started Video Playlist on YouTube.
- Download Hazus 6.1 state inventory data. All state databases downloaded prior to the Hazus 6.1 release must be replaced with new state databases for Hazus to run successfully.
Hazus 6.1 Software Requirements
Select the "Hazus Application" link below to download Hazus 6.1 for ArcMap.
Hazus Program Open Source Tools
The Hazus Program also offers open-source risk assessment tools. Our available tools aim to leverage the best available public data, open-source technology, and transparent methodologies to make data-driven risk reduction more accessible to communities across the U.S.
Hazus Flood Assessment Structure Tool (FAST): Rapidly analyze structure-specific flood losses using open-source Python - no mapping or coding skills required! FAST operates independently of Esri and Hazus software, making it easily accessible for anyone. Users can also perform an Average Annualized Loss (AAL) analysis with FAST. Download the tool and read more about it here.
Flood Hazard Import Tool (FHIT): Allows Hazus users to rapidly access and incorporate publicly available flood hazard data from ADCIRC into a Hazus 6.1 flood analysis. Download the tool and read more about it here.
Hazus Hurricane Hazard Import Tool (HHIT): Allows Hazus users to rapidly access and incorporate authoritative hurricane hazard data from HURREVAC into a Hazus 6.1 hurricane analysis. Download the tool and read more about it here.
Hazus Export Tool: Extracts and summarizes Hazus 6.1 risk assessment results in a handful of spreadsheets, shapefiles, and a visual report using open source Python. Download the tool and read more about it here.
Additional Resources and Data
Additional Resources
- Email Updates: Stay informed about webinars, workshops, and software and data updates by signing up for our email list.
- Technical Support: Contact the Hazus Help Desk at FEMA-Hazus-Support@fema.dhs.gov for assistance.
- User Manuals and Technical Manuals: Access comprehensive guides for Hazus 6.1 and Hazus 7.0. Please note that the Hazus 7.0 User Manual is available now, and the Technical Manual(s) will be available after release.
- YouTube Training Videos: Step-by-step tutorials and training sessions for Hazus 6.1 in ArcMap.
- Hazus Loss Library: A centralized repository for exploring and downloading pre-ran Hazus results.
Data Resources
Hazus Inventory National Database: The national database compiles all the Hazus baseline inventory data for the continental United States, Alaska, Hawaii and the U.S. Territories, into a single file that is easy to download and use with any GIS software. This dataset is designed to assist GIS professionals and the risk assessment community by making Hazus inventory data easily accessible. Download the data and read more in the data dictionary here.
National Structure Inventory (NSI 2022): The Hazus Program partnered with the U.S. Army Corps of Engineers (USACE) to develop the National Structure Inventory (NSI 2022). This dataset was used in the creation of the Hazus Inventory general building stock (GBS) data. Download the data and learn more about it here.
Sample Tsunami Hazard Data: The Hazus Tsunami model, currently available only in Hazus version 6.1, requires users to supply their own data, using formats adapted from NOAA's PMEL Short-term Inundation Forecast for Tsunami (SIFT) product. To make this easier, we compiled sample tsunami hazard data from PMEL SIFT for five locations: Crescent City, CA; Garibaldi, OR; Homer, AK; Kahului, HI; and Westport, WA. Each folder provides the necessary data for Level 1, 2, and 3 analysis in Hazus. These files are tested and compatible with Hazus or can serve as templates for your local data. For more details, refer to the Hazus 4.0 Release Notes. Download the sample data here.