Comparison: These households face a very expensive heating season

The Slovenian government has extended its warning of lower energy supply risk for another week, citing ongoing challenges with electricity grid stability amid heatwaves and low river flows. The decision was announced during a written session of the government on August 12, 2026, following concerns over the continued strain on the country’s power system. This measure aims to ensure the reliable operation of Slovenia's electricity network during periods of extreme weather and reduced water availability. The extension of the lower risk level comes after the government had already issued such a warning earlier in the week due to prolonged high temperatures and drought conditions affecting river levels. These factors have led to decreased water flow in the Sava River, which is critical for the safe and efficient operation of the Krška Nuclear Power Plant (NEK). As a result, the plant has been operating at reduced capacity, maintaining only the technical minimum required to function safely under current conditions. To support this effort, hydroelectric plants along the Lower Sava must adjust their operations to maintain a steady flow of water to the NEK. This involves gradually releasing stored water from reservoirs to ensure consistent inflow, thereby supporting the nuclear plant’s ability to operate at its minimum required output. According to the Ministry of Infrastructure and Energy, these adjustments are essential to uphold stable voltage levels and overall grid reliability. Despite the persistent challenges, officials noted that conditions have slightly improved compared to the previous week. A key factor contributing to this improvement is the reactivation of the 400-kilovolt transmission line between Divača and Redipuglia, which enhances the connectivity of Slovenia’s grid with neighboring systems. However, grid stability remains complicated due to the non-operation of major power stations in the Western Balkans and Hungary, alongside the ongoing effects of long-term drought. Analysis conducted by the Slovenian System Operator, ELES, indicates that sufficient energy reserves remain available within the grid. Slovenia can import any additional needed energy through remaining cross-border connections, ensuring continuous supply. Nevertheless, the government has emphasized the importance of maintaining the NEK’s operational minimum, particularly given the current environmental constraints. The government has instructed the NEK to continue operating at the minimum necessary capacity for the next week, taking into account the prevailing temperature and river flow conditions. It has also directed hydroelectric facilities on the Lower Sava to coordinate their operations accordingly, ensuring a steady water supply to the nuclear plant. This coordinated approach aims to balance the need for grid stability with the limitations imposed by the current climate situation. Ministry representatives confirmed that while the energy sector continues to face demanding conditions, there has been some progress in terms of grid stability. They highlighted the role of the recently restored transmission link in improving network resilience. Nonetheless, they acknowledged that challenges persist, primarily due to the lack of operational capacity from regional power plants and the ongoing impact of drought. The ministry reiterated its commitment to monitoring the situation closely and making further decisions based on real-time data and evolving conditions.