A Year of Extremes: Austria's Water Balance 2025
The year 2025 was a year of extremes for Austria's water balance. The annual report published today by the Federal Ministry of Agriculture, Forestry, Climate and Environmental Protection, Regions and Water Management (BMLUK) reveals worrying developments. Above-average temperatures, below-average precipitation and low snow storage characterized the year. These factors resulted in both streamflow discharges and groundwater levels being well below the long-term average.
Temperatures on the rise
Austria experienced a temperature increase of around +1.1 °C in 2025 compared to the reference period 1991–2020. These above-average temperatures occurred in all seasons and increased evaporation losses, further exacerbating existing precipitation deficits. The effects were particularly noticeable during the warm months, when evaporation further reduced already scarce water resources.
Precipitation on the decline
Total precipitation across Austria was about 14% below the long-term average. There were clear regional differences: while some areas were affected by prolonged dry spells, other regions experienced short but intense precipitation events. This uneven distribution led to a strained water situation in many parts of the country.
Snow storage at a low point
Snow storage in the winter of 2024/25 was below average, which led in spring 2025 to a reduced snow-derived contribution to runoff formation. Groundwater recharge also remained below expectations. At the start of the winter of 2025/26, snow amounts were again below the long-term average, further fueling concerns about water reserves.
Hydrological challenges
About 55% of monitoring stations on surface waters had low or very low flows on average over the year. Groundwater levels were low or very low at roughly half of the stations. Responses to precipitation events occurred only locally and briefly, which further exacerbated the situation.
Climate change as a driving force
The developments in 2025 are consistent with long-term climatic changes in Austria. Features include above-average air temperatures, a decreasing contribution from snow storage, and an increasingly pronounced temporal structure of precipitation. These factors make it clear that not only the annual precipitation total but also its temporal and spatial distribution and the intensity of individual events are decisive.
Study "Water in a Changing Climate"
To detect impacts on Austria's water cycle early on, the ongoing study "Water in a Changing Climate" is examining how climate change affects floods, heavy precipitation, low flows, groundwater and snow. These findings are intended to contribute, by the end of 2026, to the targeted further development of water management measures and to securing Austria's water resources in the long term.
Regional differences and comparisons
Austria, with its varied geography, is especially susceptible to fluctuations in its water balance. For example, the Alpine regions have traditionally relied on snowmelt as a source of water, while the eastern parts of the country are more dependent on rainfall. The situation in 2025 shows that both regions suffered from the extreme weather conditions.
A comparison with neighboring countries like Germany or Switzerland shows that similar trends can be observed there as well. In Switzerland, for instance, glacier melt has had dramatic impacts on water reserves, while in Germany increasing dry spells are posing challenges to agriculture.
Concrete impacts on citizens
For Austrian citizens, the change in the water balance means not only environmental changes but also tangible economic and social challenges. Farmers are facing crop failures, while cities and municipalities must develop strategies to ensure water supply. Rising temperatures are also leading to increased water demand while available resources are dwindling.
Political measures and future outlook
Environment and Water Minister Norbert Totschnig emphasizes the need to make evidence-based decisions and to adapt water management to the new climatic conditions. Continuous monitoring through the hydrographic measurement network provides a solid basis for detecting developments at an early stage.
In the future it will be crucial to develop innovative solutions to sustainably manage the water balance. These include investments in infrastructure, the promotion of water-saving technologies, and raising public awareness about conscious water use.
Conclusion: A wake-up call for Austria
The year 2025 was a wake-up call for Austria. The extreme weather conditions have shown that climate change is not only a threat to the environment but also to the country’s economic and social stability. It is time to act decisively and take the necessary measures to secure Austria’s water resources for future generations.
