Germany faces 25 billion ton water deficit due to rising temperatures

Germany experienced a significant water deficit in June 2026, with 25 billion tons of water missing compared to long-term averages. Data from the GRACE Follow-On satellite mission, operated by the GFZ Helmholtz Centre for Environmental Research in collaboration with NASA and the German Aerospace Center (DLR), indicates that this deficit is equivalent to more than half the volume of Lake Constance.

Researchers emphasize that the shortage is not caused by a lack of rainfall, as precipitation levels have not shown a long-term decline. Instead, rising temperatures are driving increased potential evaporation and higher water loss from vegetation. This heat-driven process is causing soil to dry out to the point where water becomes inaccessible to plant roots.

The most critical concern is the depletion of groundwater, which is responsible for the majority of the long-term decline in water reserves. While a rainy year in 2024 provided temporary relief, water levels have since dropped sharply. Experts note that since 2015, Germany has seen increasingly dry conditions compared to the preceding 15 years, with deficits being particularly pronounced in the southern and eastern regions.