Hawaii this week will resume monthly statewide testing of its Cold War-era nuclear attack warning sirens for the first time in about 30 years, in preparation for a potential missile launch from North Korea, emergency management officials said Monday.

Wailing air-raid sirens will be sounded for about 60 seconds from more than 400 locations across the central Pacific islands starting at 11:45 a.m. on Friday, in a test that will be repeated on the first business day of each month thereafter, state officials said.

Monthly tests of the nuclear attack siren are being reintroduced in Hawaii in conjunction with public service announcements urging residents of the islands to "get inside, stay inside and stay tuned" if they should hear the warning.