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 for Agriculture and Forestry, Climate and Environmental Protection, Regions and Water Management (BMLUK) highlights worrying developments. Above‑average temperatures, below‑average precipitation and low snow storage characterized the year. These factors led to both stream flows and groundwater levels falling well below the long‑term average.
Temperatures on the rise
Austria experienced a temperature increase of around +1.1 °C in 2025 compared with the reference period 1991–2020. These above‑average temperatures occurred in all seasons and amplified evaporation losses, further exacerbating existing precipitation deficits. The effects were particularly noticeable during the warm months, when evaporation reduced already scarce water resources even more.
Precipitation on the decline
The total precipitation across Austria was about 14% below the long‑term average. There were pronounced regional differences: while some areas experienced extended dry periods, other regions saw short‑lived but intense precipitation events. This uneven distribution led to strained water conditions in many parts of the country.
Snow storage at a low point
Snow storage in winter 2024/25 was below average, which resulted in a reduced snowmelt contribution to runoff formation in spring 2025. Groundwater recharge also fell short of expectations. At the start of winter 2025/26, snow amounts were again below the long‑term average, further fueling concerns about water reserves.
Hydrological challenges
Around 55% of the gauging stations on surface waters recorded low or very low flows on annual average. Groundwater levels were at low or very low levels at about half of the monitoring sites. Only locally and briefly were there responses to precipitation events, which further aggravated the situation.
Climate change as a driving force
The developments in 2025 are consistent with long‑term climatic changes in Austria. Characteristic features include above‑average air temperatures, a declining contribution from snow storage and an increasingly pronounced temporal pattern of precipitation. These factors make clear that not only the annual total of precipitation but also its temporal and spatial distribution and the intensity of individual events are decisive.
Study "Water in Climate Change"
As part of the ongoing study "Wasser im Klimawandel" (Water in Climate Change), researchers are examining how climate change influences floods, heavy rain, low flows, groundwater and snow to detect impacts on Austria's water cycle at an early stage. The insights are expected to help further develop water management measures and secure Austria's water resources in the long term by the end of 2026.
Regional differences and comparisons
With its diverse geographical conditions, Austria is particularly vulnerable to fluctuations in the water balance. For example, the Alpine regions have traditionally relied on snowmelt as a water source, while the eastern parts of the country depend more on rainfall. The situation in 2025 shows that both regions suffered under the extreme weather conditions.
A comparison with neighboring countries such as Germany or Switzerland shows similar trends there as well. In Switzerland, for example, glacier melt has dramatic effects on water reserves, while in Germany increasing dry spells are challenging agriculture.
Concrete impacts on citizens
For Austrian citizens, the changes in the water balance mean not only environmental shifts but also tangible economic and social challenges. Farmers face crop losses, while cities and municipalities must develop strategies to ensure water supply. Rising temperatures also lead to increased water demand at the same time that available resources are dwindling.
Political measures and outlook
Environment and Water Minister Norbert Totschnig stresses the need to make fact‑based decisions and to adapt water management to the new climatic conditions. Continuous monitoring by the hydrographic measurement network provides a solid basis for detecting developments early.
In the future it will be crucial to develop innovative solutions to manage the water balance sustainably. These include investments in infrastructure, the promotion of water‑saving technologies and raising public awareness for conscious water use.
Conclusion: A wake‑up call for Austria
The year 2025 was a wake‑up call for Austria. The extreme weather conditions showed 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.
