North Korea’s substantial nuclear arsenal and improving intercontinental ballistic missile capacity pose a growing threat to America’s security. But we need not face an immediate crisis if we play our hand carefully.

Given the bluster emanating from Pyongyang and Bedminster, N.J., Americans can be forgiven for feeling anxious.

Shortly after adoption of new United Nations sanctions last weekend, North Korea threatened retaliation against the United States “thousands of times” over. Those sanctions were especially potent, closing loopholes and cutting off important funding for the North. August is also when the United States and South Korea conduct major joint military exercises, which always set Pyongyang on edge. In August 2015, tensions escalated into cross-border artillery exchanges after two South Korean soldiers were wounded by land mines laid by North Korea. This juxtaposition of tough sanctions and military exercises has predictably heightened North Korea’s threats.

We have long lived with successive Kims’ belligerent and colorful rhetoric — as ambassador to the United Nations in the Obama administration, I came to expect it whenever we passed resolutions. What is unprecedented and especially dangerous this time is the reaction of President Trump. Unscripted, the president said on Tuesday that if North Korea makes new threats to the United States, “they will be met with fire and fury like the world has never seen.” These words risk tipping the Korean Peninsula into war, if the North’s leader, Kim Jong-un, believes them and acts precipitously.