It is estimated that by 2030, future probable reduction in the superficial water flow of between 10 and 50% for some areas is expected. This reduction in the water flow, along with the predicted temperature increases and precipitation reduction will result in lower water supply for population use, human development, and irrigation in agriculture. The probable increase in intense rainfall may overwhelm sewer systems in cities, where storm sewers are not separated from sanitary sewers. A probable future increase in droughts combined with a decrease in precipitation, will greatly increase Guatemala’s vulnerability to water scarcity, especially in the drier and warmer regions in the east and coastal areas. Serious water shortages are expected on the plains, the Motagua Valley, and the Pacific coast of Guatemala. Vulnerabilities will be further magnified by the negative interaction between anticipated increases in demand for water for domestic use and irrigation.
This section provides insights into projected climate change impacts on various hydrological indicators.