High temperatures could halve nuclear power production at plants along France's Rhone River this week. Output restrictions are expected at two nuclear plants in eastern France due to high temperature forecasts, nuclear operator EDF said.... Otherwise, the ecosystems will be even more affected," he added. Charon heatwave: Why is it so hot in Europe and how long will it last?... Extreme heatwaves killed 61, 000 Europeans last summer, research shows What is EDF doing to adapt to the heat?...