Scores of flights to Japan have been halted or rerouted and air travellers are avoiding Tokyo for fear of radiation. On Wednesday, both France and Australia urged their nationals in Japan to leave the country as authorities grappled with the world’s most serious nuclear accident since the Chernobyl disaster in Ukraine in 1986.
Russia said it planned to evacuate families of diplomat on Friday.
In a demonstration of the qualms about nuclear power that the crisis has triggered around the globe, China announced that it was suspending approvals for planned plants and would launch a comprehensive safety check of facilities.
China has about two dozen reactors under construction and plans to increase nuclear electricity generation about seven-fold over the next 10 years.
Russian President Dmitry Medvedev said nuclear power was safe provided power stations were built in the right place and designed and managed properly. Russia ordered checks at nuclear facilities on Tuesday.
In Japan, the plight of hundreds of thousands left homeless by the earthquake and devastating tsunami that followed worsened following a cold snap that brought snow to worst-affected areas.
Supplies of water and heating oil are low at evacuation centres, where many survivors wait bundled in blankets.
“It’s cold today so many people have fallen ill, getting diarrhea and other symptoms,” said Takanori Watanabe, a Red Cross doctor in Otsuchi, a low-lying town where more than half the 17,000 residents are still missing.
While the official death toll stands at around 4,000, thousands are listed as missing and the number of dead is expected to rise.
At the Fukushima plant, authorities have spent days desperately trying to prevent water designed to cool the radioactive cores of the reactors from evaporating, which would lead to overheating and possibly a dangerous meltdown.
Until the heightened alarm about No.3 reactor, concern had centred on damage to a part of the No.4 reactor building, where spent rods were being stored in pools of water, and also to part of the No.2 reactor that helps to cool and trap the majority of cesium, iodine and strontium in its water.
Japanese officials said they were talking to the US military about possible help at the plant.
Concern has mounted that the skeleton crews dealing with the crisis might not be big enough or were exhausted after working for days since the earthquake damaged the facility.
Authorities withdrew 750 workers for a time on Tuesday, briefly leaving only 50. All those remaining were pulled out for almost an hour on Wednesday because radiation levels were too high, but they were later allowed to return. By the end of the day, about 180 were working at the plant.
