Reading about the US decision to evacuate people out of Japan makes me roll my eyes. I can maybe see where people in Tokyo -- a mere 200 miles away from the problem may think that's a little too close for comfort. But Nagoya? It's 400 miles away from the Fukushima plant. That's like saying there's a problem in San Francisco, so let's evacuate everything between here and LA. Or actually, a more appropriate analogy would be that someone conducts nuclear tests in the Nevada desert, so let's evacuate Oakland. Seriously. It's a long distance, the winds don't blow that way, and there's a whole lot of mountain ranges in between.
As with any crisis, there is a lot of confusing and conflicting information. Don't take everything you read as a sign that the world is ending.