North Korea is warning foreigners to leave South Korea because it says the two countries are on the brink of war.
Observers say the threats are mostly bluster aimed at bolstering the image of North Korean leader Kim Jong Un.
Still, America's allies in the region are taking precautions.
Japan has deployed two interceptor missiles capable of engaging a North Korean rocket.
Meanwhile, the North has shut down a joint industrial complex that it shared with the South.