Create a composite map of the risk assessment data that have been collected and mapped, and create a composite loss map. A composite map overlays the results of individual hazard maps to determine areas with relatively more assets at risk than others.

FEMA has developed a loss estimation model that is useful in estimating losses from earthquakes, floods and hurricane winds. HAZUS-MH is a geographic information system (GIS) software package that uses census data and other existing databases to estimate damage and losses, including:

• Physical damage: damage to residential and commercial buildings, schools, critical facilities, and infrastructure;
• Economic loss: lost jobs, business interruptions, repair and reconstruction costs; and
• Social impacts: impacts to people, including requirements for shelters and medical aid.