Earlier this month, Romania sank 4 rock-filled barges into the Danube to keep its nuclear reactor running. Days later, the river rose 1.6 inches when forecasters had expected it to fall

Romania has deployed four rock-filled barges in the Danube to redirect scarce river water toward the Cernavodă nuclear power plant as severe drought conditions threaten cooling supplies. The intervention produced an unexpected 1.6-inch rise in the river level, despite forecasts predicting an equal decline.