The wildland–urban interface (WUI) occurs at the intersection of houses and undeveloped wildlands, where fire is a safety concern for communities, motivating investment in planning, protection, and risk mitigation. Because there is no operational definition of WUI based on where fires in fact have occurred, I used fire occurrences to objectively establish a definition of WUI, while examining spatiotemporal changes, for the conterminous United States.

In many cities and urban areas in Africa, land acquisition for urban redevelopment, land readjustment, and resettlement of affected urban residents are currently framed as innovative approaches to eradicating informal settlements, improving the living environments, and supporting the implementation of newly adopted city Master Plans. Nevertheless, it is not yet known how the responses of institutions and affected people shape these processes.

Urban development is the result of the interaction between anthropogenic and environmental dimensions. From the perspective of its density, it ranges from high-density populated areas, associated with large cities that concentrate the main economic and social thrust of societies, to low-density populated areas (e.g., rural areas, small–medium-sized cities). Against the backdrop of the new technological and environmental era, this commentary offers insights on how to support spatial planning policies for sustainable urban growth in low-density areas.