At the school in El Guarumal, a remote village in eastern El Salvador, the children no longer have to walk several kilometers along winding paths to fetch water from wells; they now "harvest" it from the rain that falls on the roofs of their classrooms.
In neighbourhoods like Tehuixtitla in southern Mexico City, rain brings joy, because it provides water for showering, washing dishes and clothes, and cooking, by means of rainwater harvesting systems (RHS).
Children from the neighboring municipalities of Ovalle and Río Hurtado in northern Chile are harvesting rain and recycling greywater in their schools to irrigate fruit trees and vegetable gardens, in an initiative aimed at combating the shortage of water in this semi-arid region.
Dozens of trucks used to leave São Gonçalo every day, carrying the local agricultural production, mainly coconuts, to markets throughout Brazil, including the cities of Rio de Janeiro and São Paulo, more than 2,000 kilometers away.
"I've been used to hauling water since I was eight years old. Today, at 63, I still do it," says Antolín Soraire, a tall peasant farmer with a face ravaged by the sun who lives in Los Blancos, a town of a few dozen houses and wide dirt roads in the province of Salta, in northern Argentina.
Twenty-five years ago, Mexican engineer Gustavo Rodriguez decided to collect rainwater to solve the scarcity of water in his home and contribute to the care of natural resources.
Rainwater harvesting in Kenya and other places is hardly new. But in this water-stressed country, where two-thirds of the land is arid or semiarid, the quest for a lasting solution to water scarcity has driven useful innovations in this age-old practice.
Water rationing has become a way of life for the 1,800 residents of the tiny island of Barbuda, which has been experiencing prolonged dry periods, especially in the Highlands area near the main agricultural lands.
A centuries-old system for ensuring water security is making a comeback in the Caribbean.