I am scared this is the beginning of the end?

As you probably know, N.Korea and S.Korea are on the brink of war, and now America is getting involved (why?, i don't know) and China and Japan are on N.Korea's side, this is some serious stuff, this could be WW3 and it will be a Nuclear war if it is. This world can't cope with a Nuclear war, i live in England where we lack Nuclear warheads compared to China etc. Were outnumbered and i'm scared to death of, well, death, i don't want to die because of something people who live thousands of miles away have decided to do, what should i do?