MSN reports that “the walls of a building at a nuclear power station crumbled Saturday following an explosion only hours after Japanese officials said they feared the reactor could melt down.” Fortunately, most of the 51,000 residents living within the danger zone have already been evacuated. Continue reading for the news report and footage.

The 8.9 magnitude quake and the tsunami that followed cut off electricity to the site and disabled emergency generators, knocking out the main cooling system.

[via MSN]