The powers that be in North Korea will not do anything unless they have nothing to lose. These threats are usually just that, threats, and so we appease them. Their threats to the US are insignificant, even for a person who lives in Hawaii. We often like to joke that NK trying to nuke Washington DC is the greatest danger Hawaii faces, being that is the only chance in hell they have of accidentally blowing up Honolulu with a jalopy nuke.
Still in the back of ones head... they are scary crazy and a real threat to the Korean border and local seaways. I joke about it here but millions very well could die in a war with NK.