Residents of Guam have been issued with advice on what to do if North Korea launches an attack.
The guidance includes taking cover quickly in a concrete structure, preferably underground.
It also includes guidance on removing radioactive material, saying: “When possible, take a shower with lots of soap and water to help remove radioactive contamination.
“But don’t scratch or scrub skin and do not use conditioner in your hair because it will bind radioactive material to your hair.”
Officials have not raised the US territory’s threat level after Pyongyang said it had laid out plans to strike near the island in the coming weeks.
Guam governor Eddie Calvo said the territory has many buildings made to withstand powerful typhoons, yet he acknowledged that nothing can protect against a nuclear attack.
President Trump assured Mr Calvo that Guam is safe during a phone call. He said: “We are with you a thousand percent. You are safe.”
(c) Sky News 2017: Guam residents issued with advice on what to do if North Korea attacks