About five hours ago, North Korea fired 200 rounds of artillery at an inhabited South Korean island called Yeonpyeong. South Korea responded with a fighter jet deployment and 80 rounds of artillery. In other words, it looks a lot like the two Koreas are in a shooting war.
It could also cycle down. The island in question has 1300 inhabitants. It’s not the heart of the Korean peninsula. The US and China have already called for an end to hostilities; maybe someone will listen.