Reports from Japan say radioactivity in water at reactor 2 at the damaged Fukushima nuclear plant is 10 million times more than the usual level. Workers trying to cool the reactor core to avoid a meltdown have been evacuated. Earlier, Japan's nuclear agency said that levels of radioactive iodine in the sea near the plant have risen to 1,850 times the usual level. It is believed the radiation at Fukushima is coming from one of the reactors, but a specific leak has not been identified. The plant's operator has been berated for a lack of transparency. The government said Tokyo Electric Power Co had to provide information more promptly. The nation's nuclear agency said the operator of the Fukushima plant had made a number of mistakes, including worker clothing. The death toll from the March 11 earthquake and tsunami has now passed 10,000, and more than 17,440 people are missing. The head of the world's nuclear watchdog agency has warned that Japan was still far from the end of the accident that struck its Fukushima nuclear complex. Director general of the International Atomic Energy Agency, Yukiya Amano, said Japanese authorities were still unsure about whether the reactor cores and spent fuel were covered with the water needed to cool them. Amano said he saw a few positive signs, with the restoration of some external electric power to the plant. But he added that more efforts should be done to put an end to the accident. He warned that the nuclear emergency could go on for weeks, if not months, given the enormous damage to the plant. Amano, a former Japanese diplomat who took over the IAEA in late 2009, said his biggest concern was the spent fuel rods sitting in open cooling pools atop the reactor buildings.