In this issue we address the practice of rainwater harvesting in different settings, presenting experiences from Argentina, Brazil, Chile, Mexico, and Paraguay. Some of the papers were originally presented at the IX International Meeting of the WATERLAT-GOBACIT Network“Water, Rights, and Utopias: priorities in the process of democratization of water politics“, João Pessoa, Paraiba, Brazil, 3-7 September 2018. Article 1 was authored by David Sauri, from the Autonomous University of Barcelona, Spain, co-editor of this issue. The article provides an overall introduction to the topic of rainwater harvesting. Article 2, by Martin Sanzana Calvet, Institute of Strategic Studies for Human Development (INEDH), Concepción, Bio-Bio, Chile, addresses the practice of fog catching in arid and semi arid regions of Chile. In Article 3, Daniel Tagle-Zamora, University of Guanajuato, Leon, Guanajuato, Mexico, presents findings from research on the implementation of public policies oriented at the provision of rainwater catchment technologies, mostly for domestic use ,in several municipalities of the semi arid State of Guanajuato, Mexico. Article 4 was co-authored by Roberto de Sousa Miranda, Federal University of the interior of Pernambuco and Federal University of Campina Grande, Paraiba, Brazil, and Laiany Tassila Ferreira, Federal Rural University of Pernambuco, Brazil.The article discusses the implementation of a national plan to provide rainwater cisterns in the semi arid region of North eastern Brazil, with emphasis on the experience of the State of Paraiba. Finally, Article 5, by Ana Maria Attias Sole and Ricardo Lombardo Lopez, from the North-eastern National University, Resistencia, Chaco, Argentina, provides an overview of the historic legacy of water practices and technologies inherited fromthe“syncretism”between indigenous communities (Tupi-Guarani), and the Jesuit territorial expansion that took place between the early seventeenth and the mid eighteenth centuries in a large region of South America encompassing parts of Argentina, Bolivia, Brazil, Paraguay and Uruguay. The article focuses mainly on examples from Argentina, Brazil, and Paraguay, and provides insights into the significance of historical-cultural research in the production of knowledge about rainwater technologies and the associated culture and practices, which also contributes to our network’s Thematic Area 7, Water-related Art, Communication, Culture, and Education.