This paper presents and discusses the water supply crisis and the resulting risk of rationing in regional scale in the Brazilian Southeast (2014/15). Considering the extension, magnitude and intensity of this crisis, particularly in S?£o Paulo metropolitan areas and throughout Para?-ba do Sul river, it is argued that new spatialities are emerging and imposing adjustments to water management. According to this paper, the latter is a question of geo-institutional nature. It is not possible to understand the water supply crisis and emergency actions as exclusively related to flow control and reduction. From this understanding comes the urgency of a territorial agenda, that is, one that considers the relations between different spaces, diverse agents, and the environmental history itself in Para?-ba do Sul river basin.
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