North Korean missiles no threat to Guam - advisor

The Homeland Security advisor for the Governor of Guam says he's more worried about the US territory being struck by a typhoon than a missile from North Korea.

Its military test fired several medium-range missiles since April, prompting an exchange of war rhetoric with US President Donald Trump.

Guam is home to a large military base, but the advisor, George Charfauros, said the Pacific island was protected by the National Missile Defence.

"The probability of any of those missiles, North Korean missiles, hitting Guam or getting through the defensive system in place is very low," he said

"I would say point-zero-zero-zero-one probability. You're more likely to get hit by lightning than one of those missiles."

George Charfauros said while the missiles can't reach Guam they pose a threat to South Korea and Japan.