Hawaii Island sirens set for routine monthly test Monday
A one-minute steady tone sounded across Hawaii Island at 11:45 a.m. Monday, and no drill followed. Residents were told to recognize it as the routine siren check, not a real emergency.
A one-minute steady tone sounded across Hawaii Island at 11:45 a.m. Monday as the statewide outdoor warning siren system went through its monthly test, and residents were not asked to shelter, evacuate or take any other action. The signal was paired with the Emergency Alert System’s live audio broadcast test, a routine coordination with Hawaii’s broadcast industry that helps confirm the warning network is working as designed.
There was no exercise or drill attached to the test. That is the key difference residents need to remember: a monthly siren check is a system verification, while a real emergency alert would come with instructions tied to an actual hazard. If you hear the steady one-minute tone during the monthly test, treat it as a routine signal and use it as a cue to make sure every member of the household knows what the siren sounds like and what an actual warning would require.
The siren network is not a relic left on the coastline. Hawaii Emergency Management Agency describes it as the largest single integrated outdoor siren warning system for public safety in the world, used for tsunamis, hurricanes, dam breaches, flooding, wildfires, volcanic eruptions, terrorist threats and hazardous-material incidents. HI-EMA says the sirens can reach 121 decibels and have a manufacturer radius of 3,400 feet, although terrain and weather can affect how far the sound carries. That reach makes the monthly test more than a formality on an island that lives with layered natural hazards.
The June 1 check matched the same standing pattern seen in monthly tests on Dec. 2, 2024, June 2, 2025 and Oct. 1, 2025, all set for 11:45 a.m. and coordinated with the Live Audio Broadcast segment of the Emergency Alert System. For Hawaii Island households, schools and businesses, the practical job now is to verify that emergency plans are current, wireless alerts are turned on, and staff or family members know that a steady tone during the monthly test is expected, not a call to evacuate. Anyone who hears a siren and notices a problem can report it to Hawaii County Civil Defense Agency Emergency Management Division at 808-935-0031, and HI-EMA also tracks siren performance through its statewide status map.
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