According to the ABC reports and others the Japanese government has admitted that the early figures given for radiation levels outside the reactor complex were actually 1000 times higher than indicated because the press releases all put the symbol for micro sieverts after the numbers instead if milli sieverts.
It is now being officially described as harmful to health to be within 30 kilometres of the reactors. A cooling pond in reactor 4 is on fire after an earlier explosion, and No 2 also blew at at dawn. That's four reactors going bang.
Radiation levels are rising sharply near Tokyo, but not a threat to health, which apparently is official talk for run for your lives.