It was recently upgraded to a 7 on the International Nuclear and Radiological Event scale, the highest value on the scale. Chernobyl also rated a 7. But this does not mean that Fukushima is as bad as Chernobyl, or that conditions are worsening.
Officials say the plant is more stable now than immediately following the tsunami, but decided to upgrade the level retroactively based upon estimation of total amount of radioactive materials released since the earthquake.
Officials did admit that Fukushima has released about 1/10 as much radioactive material as Chernobyl.