Weather tracker: Unusually warm rivers affect French nuclear power plants

European Heatwave Disrupts Nuclear Operations and Sparks Wildfires

River Temperatures Challenge French Nuclear Facilities

Weather tracker - A combination of elevated temperatures and diminished precipitation throughout western and central Europe has created mounting strain on natural waterways, ecological systems, and energy production networks. The extended period of atmospheric high pressure has delivered sustained sunshine while simultaneously reducing rainfall and accelerating evaporation rates. Consequently, river levels have dropped considerably while water temperatures have climbed well above seasonal norms. These elevated river temperatures are now impacting electricity generation capacity across France, where multiple nuclear facilities depend on river water for their cooling systems. French environmental legislation requires operators to cap the quantity of thermal energy released back into waterways, which means power stations may need to curtail electricity production when river temperatures exceed acceptable limits.

Earlier in the current month, EDF implemented a temporary reactor shutdown at the Golfech nuclear facility after the Garonne River neared its environmental discharge limit. Meanwhile, the Nogent nuclear power station is anticipated to face production constraints beginning on 14 July should the river attain its projected temperature levels. The sustained heatwave has simultaneously driven up electricity consumption as households and businesses across much of Europe have increased their reliance on air conditioning systems to cope with the uncomfortable conditions.

Dangerous Wildfire Conditions Sweep Iberian Peninsula

The same persistent atmospheric pattern responsible for the warm rivers has also generated hazardous wildfire conditions throughout the Iberian peninsula. Spain confronted several major fires during the previous week as extended periods of intense heat, exceptionally arid vegetation, and scarce rainfall merged with low relative humidity and intermittent strong winds to establish ideal circumstances for rapid fire propagation. One of the most substantial blazes erupted in the Almería province, triggering mass evacuations and mobilizing extensive firefighting resources to contain the spreading flames.

The convergence of these meteorological factors has created a particularly volatile environment where dry vegetation can ignite easily and spread quickly under the right wind conditions. Firefighters have been working around the clock to protect communities and natural habitats from the advancing flames, while emergency services have coordinated evacuation efforts for residents in the most vulnerable areas.

Typhoon Bavi Brings Flooding Threat to East Asia

Meanwhile in Asia, Typhoon Bavi has diminished to severe tropical storm status following its two separate landfalls along China's eastern coastline. Despite this reduction in intensity, the system continues to present a substantial flooding hazard as it advances further inland. Prior to reaching Chinese territory, Bavi underwent rapid intensification over unusually warm Pacific waters, achieving Category 5 classification and establishing itself as one of the most powerful tropical cyclones recorded during the 2026 north-west Pacific season.

More than 2 million people were evacuated before the storm made landfall in China, while hundreds of flights, rail connections, and ferry services were suspended to ensure public safety. Earlier in its trajectory, Bavi grazed the northern extremity of Taiwan and traversed Japan's Sakishima Islands, delivering destructive winds, heavy rainfall, and widespread transportation interruptions. Although wind speeds have decreased since the initial landfall, the storm retains an enormous reservoir of tropical moisture. Its gradual inland movement is expected to extend periods of intense rainfall across eastern China throughout the coming week, heightening concerns about flash flooding, river overflow, and potential landslides in mountainous regions.

Weather Outlook Points to Continued Challenges

While meteorological forecasts suggest temperatures may moderate somewhat in certain regions, weather models consistently project warmer-than-average conditions across much of southern Europe over the next several days. With minimal widespread precipitation anticipated, vegetation is likely to stay dry, keeping wildfire danger elevated across much of the continent. Additionally, rivers throughout western Europe are expected to maintain their unusually warm temperatures, potentially requiring continued adjustments to nuclear power plant operations as the heatwave persists.

The extended nature of this weather pattern means that multiple systems—energy production, transportation, and emergency services—are all being tested simultaneously across different regions.

As the situation develops, authorities in both Europe and Asia continue to monitor conditions closely, preparing for potential further intensification of the weather systems affecting their populations and infrastructure.