This study focus into two different approaches to assess hazards and vulnerabilities: (1) the geospatial indicators and (2) modelling of debris flow and flooding events. The integration of both methods through a multiscale analysis: (i) in a regional scale, geospatial indicators show the priority watersheds for risk reduction in the different hazards - landslides, flooding and rising sea level, (ii) locally, the analysis based on a 1967s extreme event in Caraguatatuba - with rainfall variation of 115-420mm and max. 841mm - show the consistent analysis of historical data of tidal levels and the rainfall effects of flooding and debris flow in the districts of ?Santo Antônio' river basin
