Fire Flares at Nuclear Plant; 2 Workers Missing

Yet another fire appears to have erupted at Japan's Fukushima Dai-ichi nuclear plant, reports Reuters. Details remained sketchy, and it's possible this fire is a flare-up from an earlier fire at the building that houses reactor No. 4. That earlier fire blew a hole in the building and emitted radiation, and two workers remain missing, notes MSNBC. What's worse, officials are now for the first time seeing rising temperatures at reactor units 5 and 6 at the plant.

It's not clear how much danger is posed by the earlier radiation leak, but it apparently came from steam from boiling water, not from the fuel rods themselves, which would have been worse, explains MSNBC. "It's not good, but I don't think it's a disaster," says one physicist. (More Japan earthquake stories.)