We use largely used methodologies, developed by federal agencies. for Risk assessment. These methodologies assess the risk of urban sectors subjected to environmental hazards: 

• earthquakes, 
• tsunamis, 
• hurricanes,
• flooding 

The multi-hazard risk analysis delivers an estimation of losses:

• Physical damage (probabilistic assessment of the number of affected buildings,  debris)
• Direct economic losses ($ in property values due to various levels of damage)
• Direct social losses (casualties, required shelters)
• Loss of functions (probability or days)

We work with three levels of analysis:

1. Level one, based on a collection of baseline inventory databases for every U.S. state and territory. This level of analysis is of relatively easy access and does not require a deep understanding of the methodology and the involved engineering and scientific knowledge. Results at this level are not obtained from refined local data and deliver first approach results.
2. Level 2: This more advanced level of analysis requires evaluating local data and its combination with baseline inventories and damage information. The effort required to model level 2 involves advanced engineering knowledge, local data capture, use of remote sensors, and more sophisticated data. Results will provide an estimation of losses per census tracts or census blocks (this can be different for each analysis, i.e., hurricane analysis delivers results per census tract, while flooding analysis delivers results per census blocks). 
3. Level 3: This level allows the analysis building by building; this implies a substantial effort for the collection of the data, as well as advanced engineering knowledge for the damage information and the data interpretation

Several multi-hazard risk assessment methodologies are also available. To mention some of them:

•  Multi-Hazard and Multi-Risk  Assessment Methods for Europe  (MATRIX) project 
• INFRARISK: Novel Indicators for Identifying Critical Infrastructure at Risk from Natural Hazards  
• Methodology for Regional Multihazard Hurricane Damage and Risk Assessment. NC State University
• On several occasions, specific risk evaluation methods are required. 
• ENRIR has developed fragility and vulnerability curves for various studies; two of them are the risk assessment of low-cost housing in Latin America (with formal and informal construction procedures), analysis of highway systems