Wildland-urban interface (WUI) fires predominantly originate in wildland fuels and subsequently spread through a spatially heterogeneous and non-contiguous fuel system of structures and residential and wildland vegetation. Commonly used wildland fire models were not developed to handle this complex fuel system. Also, there has been very little activity in the research community to develop data collection methods that capture WUI fuel types and their spatial variation over community scales. For example, the spatial variation of vegetative WUI fuels is often below the resolution (~30 m) of satellite based LANDFIRE wildland fuel maps. In this conference paper, an overview of the use remote sensing data for mapping WUI characteristics will be presented. Specific examples for two WUI communities will be given. The resulting dataset is used to create input files, via a GIS application, for the wildland-urban interface fire dynamics simulator (WFDS). Results from WFDS, applied to a number of settings, are given to illustrate its use in these communities and for exploring risk reduction via wildland fuel treatments.