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Wildland Fire Risk to Flammable Structures, v2000

The threat of wildland fire burning flammable structures is a national issue. Each year the risk increases from accumulating wildland fuels and building flammable structures adjacent to wildlands. We defined and mapped potential risk of wildland fire burning flammable structures for the conterminous United States. The map was an integration of three GIS data layers: Housing Density, Potential Fire Exposure, and Extreme Fire Weather Potential. Housing Density was a classification of human habitation ranging from wildland to city in units of houses per hectare. Housing Density was derived from estimates of ambient population. Potential Fire Exposure was a classification of vegetation types into fire behavior classes that exhibit similar fire or heat intensity under extreme weather conditions. Extreme Fire Weather Potential was a classification of the average number of days per year where weather conditions, specifically temperature, relative humidity, and wind speed, were similar to conditions under which wildland fires had burned multiple structures in a single event. Flammable structures are structures that have a low resistance to ignition. Wildland fires are vegetation fires that start and burn in unpopulated/undeveloped areas.


Modified: Mar 11, 2014