General Brazilian
áreas de risco
Standard term used throughout Brazil for dangerous urban neighborhoods or geographical zones
Rio de Janeiro
áreas de risco / comunidades de risco
Often used to refer to favelas and socially vulnerable neighborhoods
São Paulo
áreas de risco / regiões críticas
Commonly used in urban planning and public safety contexts
Portugal
áreas de risco / zonas de risco
Used in disaster prevention, urban planning, and occupational safety contexts