The latest summer advice for Hawaii goes beyond using adequate sun block and properly riding out a tropical storm.

The state’s emergency management authorities recently released official guidelines on how to survive a nuclear detonation: Seek shelter in a blast-resistant structure, and do it in minutes. Also take note: The light from the blast can damage your eyes.

But why now?

Rising tensions with North Korea have put the possibility of a total wipeout on the radar of the archipelago’s population of more than 1.4 million. On July 5, the United States toughened its military pressure and invective against the Communist nation after North Korea conducted a successful test of an intercontinental ballistic missile that appeared capable of hitting America’s two most western states: Alaska and Hawaii.

The United States described the test as a “dangerous escalation” in what has become a crisis for the Trump administration.