The nuclear reactor of Grohnde in Lower Saxony, Germany is also currently being shut down. Like many reactors this one depends on a river (River Weser) for cooling. The water temperature of the Weser will reach 26° Celsius by tomorrow, which is a threshold value for serious damage to the ecosystem along the riverside – so the decision was made to not let the reactor contribute to further heatup of the river. The shut down is expected to last until sunday or monday.