In recent weeks, radiation levels have spiked at the Fukushima nuclear power reactors in Japan, with recorded levels of 10,000 millisieverts per hour (mSv/hr) at one spot. This is the number reported by the reactor's discredited owner, Tokyo Electric Power Co., although that number is simply as high as the Geiger counters go. In other words, the radiation levels are literally off the charts. Exposure to 10,000 millisieverts for even a brief time would be fatal, with death occurring within weeks.

New details are emerging that indicate the Fukushima nuclear disaster in Japan is far worse than previously known, with three of the four affected reactors experiencing full meltdowns. Meanwhile, in the U.S., massive flooding along the Missouri River has put Nebraska's two nuclear plants, both near Omaha, on alert. The Cooper Nuclear Station declared a low-level emergency and will have to close down if the river rises another 3 inches. The Fort Calhoun nuclear power plant has been shut down since April 9, in part due to flooding. At Prairie Island, Minn., extreme heat caused the nuclear plant's two emergency diesel generators to fail. Emergency-generator failure was one of the key problems that led to the meltdowns at Fukushima.