The governor of the region at the centre of Japan's nuclear crisis has criticised official handling of the evacuation of the area around the stricken Fukushima Daiichi power plant. Fukushima prefecture governor Yuhei Sato said: "Anxiety and anger felt by people have reached boiling point." Engineers are racing to avert a nuclear catastrophe at Fukushima Daiichi, badly damaged by Friday's quake and tsunami. The government has declared a 20km (12-mile) evacuation zone around it. Another 140,000 people living between 20-30km of the facility were told on Tuesday not to leave their homes. Mr Sato said centres already housing people who had been moved from their homes near the plant did not have enough hot meals and basic necessities such as fuel and medical supplies. "We're lacking everything," he said. Japanese media have became more critical of Prime Minister Naoto Kan's handling of the disaster, and have accused both the government and plant operator Tokyo Electric Power Co of failing to provide enough information on the incident. Thousands of people were killed in the 9.0-magnitude quake and tsunami. In a rare public appearance, Japan's Emperor Akihito has said he is "deeply worried" about the crisis his country is facing. The atomic crisis has been caused by the tsunami wrecking back-up diesel generators which kept the nuclear fuel cool at the Fukushima Daiichi plant, 220km from Tokyo. Workers have been dousing the reactors with seawater in a frantic effort to stabilise their temperatures, since the first in a series of explosions rocked the plant on Saturday. Helicopters deployed to dump water on the facility on Wednesday were pulled out amid concerns over radiation levels in the air above the site. Reports suggest another plan is now under consideration to use water cannon. Earlier, the plant's operators evacuated its skeleton crew of 50 workers for about an hour as ground-level radiation spiked. And yet another fire broke out in a reactor, while steam billowed from another one. The power facility has sent low levels of radiation wafting into Tokyo, spreading alarm in the city and internationally. The head of the United Nations nuclear watchdog, Yukiya Amano, said developments at the plant were "very serious", as he prepared to head to the country to assess the situation. 'Unprecedented' Emperor Akihito went on live TV on Wednesday to make his first public comments on the disaster, and urged an all-out rescue effort. TV stations interrupted programming to show the emperor describing the crisis facing the nation as "unprecedented in scale". The 77-year-old - deeply respected by many Japanese - said: "I hope from the bottom of my heart that the people will, hand in hand, treat each other with compassion and overcome these difficult times." Japan's titular head of state - who acceded to the throne in 1989 after the death of his father Hirohito - said he prayed that every victim would be saved. He spoke as snow blanketed swathes of the disaster zone, where many survivors have little food, water or heat. About 450,000 people have been staying in temporary shelters, many sleeping on the floor of school gymnasiums. Nearly 3,700 people are listed as dead, but it is feared the total death toll will top 10,000 following the catastrophe, which pulverised the country's north-east coast. In other developments: * After losing $620bn (£385bn) in the first two days of this week, Japan's stock market rebounded to finish Wednesday up by 5.7% * France urged its nationals in Tokyo to leave the country or move south; two Air France planes were sent to begin evacuation * Australia advised its citizens to consider leaving Tokyo and the most damaged prefectures * Turkey warned against travel to Japan. Source: BBC