GENEVA, June 26, 2026 (BSS/AFP) - The nuclear reactors at Europe's oldest nuclear plant were shut down Friday, its Swiss operator said, after the heatwave roasting Europe sent temperatures soaring in a nearby river used for cooling.

"The temperature of the Aare River reached 25C again yesterday and today. Sufficient cooling is not in sight," energy company Axpo said on its website, adding that as a consequence, the Beznau nuclear plant "has temporarily shut down both reactors".