Jill’s Take: Hydrogen explosion at Japan’s Nuclear Plant. How safe would ours be?

Seeing the devastation in Japan, this makes me wonder how safe the US nuclear power plants would be in an earthquake or tsunami? Would we be ready if this happened here?

"The explosion at the plant's Unit 3, which authorities have been frantically trying to cool following a system failure in the wake of a massive earthquake and tsunami, triggered an order for hundreds of people to stay indoors, said Chief Cabinet Secretary Yukio Edano."

http://www.huffingtonpost.com/2011/03/13/fukushima-explosion-japan-nuclear_n_835202.html