The Offices of Guam Homeland Security and Civil Defense, U.S. Naval Base Guam, and Andersen Air Force Base will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, Nov. 4, 2025, starting at 3:15 p.m.

GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB monthly routine testing of the “Giant Voice (GV)” sirens.

Residents, visitors and motorists surrounding the AHAWS sirens and GV speakers can expect to hear pre-scripted voice messaging announcing the start and end of the test, and sixty-seconds of the “Alert” siren tone.

Future tests of the AHAWS sirens will be conducted on a monthly basis, in conjunction with NBG and AAFB, and will typically fall on the first Tuesday of each month, unless it falls on an observed holiday.

The following are a list of AHAWS siren sites to be tested:

GHS/OCD facility, Agana Heights
Hågat Marina
JFK High School
Talo’fo’fo’ Elementary School
Asan Mayor's Office
Pago Bay A-Frame South End
Inalåhan Elementary School
Yona Mayor's Office
Ft. Soledad, Humåtak
GWA Pump Station, Malesso’
Ija Agricultural Station, Inalåhan
Port Authority of Guam
Hågat Senior Citizen's Center
Hotel Nikko Guam
Tamuning Mayor’s Office
George Washington High School
Piti Village
GWA site, Malojloj
Ricardo J. Bordallo Governor’s Complex, Adelup
Benavente Middle School, Dededo
Yigo Gym
Barrigada Mayor’s Office