Hmm...maybe it wasn't such a bright idea to build to many nuclear power plants on the world's most active fault line. The engineers apparently never planned on what would happen in the event of a major earthquake. It's the 21st Century. Why is Japan getting its power from barely-controlled nuclear reactions? Why isn't everything powered by water, solar, wind? Instead, silence. Let that factoid sink in for a little while.
This being The Ghibli Blog, I'm immediately reminded of the elder Miyazaki's hatred of Man's industrialized civilization, and Nature's inevitable revenge. And that's the key to understanding his scenes of apocalypse and destruction. He's not on the side of Industria. He's on the side of the Ohmu.
An event like this should force us, as a collective species, to critically examine and question the values of our culture. The very tools and machines that have built this great civilization will also lead to its destruction. And Man's arrogant belief that he has conquered Nature, that the world is his to plunder, pollute, and destroy, will inevitably lead to Nature's revenge. And as you can see, Nature is heckuva lot bigger than you or me.