Monthly Siren and Emergency Alert System Test

Hawai‘i’s monthly test of the statewide Outdoor Warning Siren System, coordinated with the test of the live audio broadcast segment of the Emergency Alert System, is scheduled for Friday, June 1, 2018 at 11:45 a.m.

The warning sirens are used to alert the public to emergencies. During this monthly test, all warning sirens will sound a one-minute Attention Alert Signal (Steady Tone). There will be no exercise or drill accompanying the test.

The Attention Alert Signal informs residents to turn on a radio or television for information and instruction for an impending emergency, or if in a coastal inundation area, evacuate to higher ground.

Due to the ongoing Kilauea Volcano Hazard, Hawaii County Civil Defense will not be participating in the siren test. No sirens will sound on Hawai‘i Island

O‘ahu residents in areas surrounding Campbell Industrial Park may also hear a “whooping” tone following the siren test. These areas include portions of Kalaeloa, Makakilo, Nanakuli, Kapolei, and Ewa Beach. The “whooping” tone is a test of the Hazardous Materials (HAZMAT) siren warning group that will be activated in the event of a HAZMAT incident requiring emergency notification of businesses, schools and residents within the vicinity of Campbell Industrial Park. Contact the City and County of Honolulu Department of Emergency Management at (808) 723-8960 for more information on the HAZMAT warning group siren test.

The outdoor warning sirens are one part of a three-component emergency notification system. A simultaneous test of the Emergency Alert System is conducted with the siren system, in cooperation with Hawaii’s broadcast industry. In the event of a real emergency, warning sirens and Emergency Alert Broadcasts would be joined by alerts via the Wireless Emergency Alert system, which delivers sound-and-text warnings to mobile telephones and compatible devices.