# Switzerland's Beznau, Europe's Oldest Nuclear Plant, Halts Operations Amid Heatwave

*Switzerland's Beznau nuclear plant, Europe's oldest, has temporarily shut down both reactors due to high temperatures in the nearby Aare River.*

June 27, 2026 · World

## At a glance

- Beznau nuclear plant, Europe's oldest, shut down reactors due to high Aare River temperatures.
- River temperature reached 25°C, making sufficient cooling impossible.
- Shutdown is a precautionary measure to ensure safety amid ongoing European heatwave.

Switzerland's Beznau nuclear plant, the oldest in Europe, has temporarily shut down both reactors due to high temperatures in the nearby Aare River. The plant's operator, energy company Axpo, announced the shutdown after the river's temperature reached 25°C, making sufficient cooling impossible. The decision comes as a heatwave continues to roast much of Europe, driving temperatures up across the continent.

## Heatwave Impact

The unprecedented heatwave has led to a series of challenges for energy production facilities across Europe. The Beznau plant relies on the Aare River for cooling, a process critical for the safe operation of nuclear reactors. With river temperatures soaring, the plant's cooling systems were unable to function effectively, prompting the shutdown.

## Plant Background

Beznau nuclear plant, located in northern Switzerland, began operations in the 1960s. It consists of two reactors and has been a significant source of energy for the region. The plant's age and the current environmental conditions have highlighted the vulnerabilities of older nuclear facilities to climate-related events.

## Safety Measures

Axpo assured the public that the shutdown was a precautionary measure to ensure the safety of the plant and its surroundings. The company is monitoring the situation closely and will restart the reactors once the river temperatures drop to a safe level. This incident underscores the importance of adaptive measures in the face of changing climate conditions.

## Broader Implications

The temporary closure of the Beznau plant serves as a reminder of the broader challenges facing energy production in a warming world. As extreme weather events become more frequent, energy facilities must adapt to ensure both safety and reliability. This shutdown may prompt further discussions on the resilience of nuclear energy in the face of climate change.

## Sources

- BSS

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Source: https://pulsetoday.com.bd/en/world/switzerland-beznau-nuclear-plant-halts-operations-heatwave