Five stars because I'm a sucker for disaster films. It would have been four stars though because the movie could've been done with a different sort of atmosphere to it. Like, this seems like a huge scale natural disaster. The sort where your first feeling that sets the stage for the rest is hopelessness. I didn't get that vibe from this movie and I think it could have been much better.
But, like I said, I'm a sucker for disaster movies, explosions, and action. Five stars.