Updated: March 23, 22:57 (JPN)
Tokyo Metropolitan Government announced that elevated level of radioactive idoine has been ditected and advice residents not to give tap water to babies
The detail will be found here http://japanearthquakeinformation.blogspot.com/2011_03_23_archive.html
World Health Organization (WHO) posted the Q&A for health concern about Fukushima Daiichi Nuclear Power Plant accidents. WHO is supporting the evacuation order by Japanese Government as reasonable measure for protecting human health.
The level of radiation emitted from the Fukushima Daiichi Nuclear Power Plant is rising and Japanese Government ordered to the people who live with in 20-30 km from the plant to stay inside, close doors and windows and turn off air conditioning to minimize the exposure to radio active material.
They have also been advised to cover their mouths with masks, towels or handkerchiefs as well as not to drink tap water.
These area includes
▽Tokiwa-cho (partial) 常葉町
▽Oetsu-cho (partial) 大越町
▽Minamisoma City (partial) 南相馬市
▽Namie-cho (partial) 浪江町
▽Naraba-cho (partial) 楢葉町
▽Village of Kuzuo (partial)葛尾村
▽Village of Kawanaka (partial)川内村
This is not a evacuation order yet.
Fukushima Daiichi and Daini Nuclear Power Plant
If you are in any of those city, you are recommended to evaculate immidiately. They are either 20km radinus of Fukushima Daiichi or Fukushima Daini Genpatsu (Nuclear Powerplant)
▽Minamisoma City 南相馬市
▽Village of Kuzuo 葛尾村
▽Village of Kawanaka 川内村
▽Tamura City 田村市
▽Minamisoma City 南相馬市
It is also recommended for Resuidents of Fukushima prefecture to stay inside, close doors and windows and turn off air conditioning to minimize the exposure to radio active material. They have also been advised to cover their mouths with masks, towels or handkerchiefs as well as not to drink tap water.
*Don't drink cough medicine or disinfectant.
There are false rumore going around to drink cough medicine or disinfectant containing lots of idone. However, those products also contains harmful substace and not effective for protecting people from radiation exposure. You are recommended to consult with your doctor.
More information about shelters and nuclear emergency can be found this website in Japnese/English
Website of Fukushima Prefecture
Map of shelters
Reacting an Accidents at a Nuclear Powerplant