If God was going to destroy the earth?

In the future if God was so angry at the sin committed on earth and he wanted to destroy his creation by fire (possibly an asteroid), what would be expected of us to do if we had the technology to flee the planet? Since his intent was get rid of the human race would we have to stay on the planet or would we choose to use some type of space craft to preserve our species? What would YOU as an individual choose for us to do?