Efficient rainwater harvesting systems provide families with a sustainable, high-quality water source at home, meeting up to 100% of their water needs. These systems decrease reliance on municipal water, result in significant energy savings and mitigate flooding. Between 2017 and 2024, Guadalajara actively promoted the installation of Rainwater Harvesting Systems (SCALL) at the household level. These systems intercept, collect, and store rainwater for domestic use, reducing reliance on traditional sources and alleviating pressure on local aquifers. An example is the water crisis that the Metropolitan Area of Guadalajara suffered in 2021, in which one of its main water supply sources was compromised, so it was urgent to start triggering a. Through an approach that combines data science, territorial planning, and community participation, this study demonstrates how rain-catching systems can be key to improving the quality of life in urban areas most affected by water scarcity. In Guadalajara, the second largest metropolitan area in Mexico, 500,000 people have been without any water since March 2021. Overview of the need Mexico is currently experiencing its worst draught in three decades. Water access is a critical problem in parts of Mexico. Collecting and distributing rainwater is reducing health risks and freeing up time for women and girls to follow their dreams. For Elena Cruz and thousands like her, rainwater harvesting is more than a technical solution—it’s a symbol of dignity, resilience, and possibility. In a city where water too often equals struggle, Isla Urbana is proving that equity can fall from the sky—if we’re willing to catch it. Includes Sustainable Development Goals from the project and its locations. Includes tags from the project and its locations. Installation of rainwater harvesting systems in schools facing scarcity issues. Educational workshops aimed at students, teachers, and parents. This award is presented to Dhaka North City Corporation and the Metropolitan Area of Guadalajara to recognise their cities’ tangible, positive steps towards making infrastructure, nature and communities more resilient to the impacts of climate breakdown. Jalisco’s rainwater harvesting program (Nidos de Lluvia) will be expanded in 2025 with the installation of 3,300 new systems across the same number of homes, announced Ernesto Marroquín Álvarez, secretary of Integrated Water Management.