Community risks were determined via statistical regression models that predict various types of risk as a function of community attributes. Five community risks were modeled separately for low- medium- and high-hazard structures. The community risks were:
Community risks were estimated for each of three different classes of structures in a community including low, medium, and high hazard structures as categorized by the NFPA.
Community risks were also estimated as a function of the socio-demographic and geographic characteristics of the locations (census tracts) of reported structure fires over a seven year period (2007-2013) according to available NFIRS data. The socio-demographic attributes include:
The final set of variables varied by model, and were selected to ensure the best prediction of risk. Note that because deaths are rare, many departments will be predicted to have only a fractional number of deaths.
Community risks are not currently estimated for communities with populations less than 10,000 people because small departments are expected to behave different from larger departments. The model is under continued development to ensure all communities are captured in FireCAREs. The number of departments for which estimates are generated are listed below.