(BIVN) – New outdoor warning sirens are going up at three Hawaiʻi County parks in Hilo.

The Hawai‘i County Civil Defense Agency announced on Thursday that the warning sirens are scheduled to be constructed in Malama Park, Mohouli Park, and Ainako Park, starting tomorrow.

During construction – from Friday, June 14 to Friday, June 28 – residents and business owners can expect general construction noise and increased traffic during business hours, the County says.

The outdoor warning sirens will be approximately 45 feet high, and will be heard within a 3,400 ft. radius from the siren location, if they listener is outdoors.

Hawaiʻi County officials say:

Outdoor warning sirens, located throughout the State and Island of Hawaii, are used to alert the public to emergencies. In an emergency, the siren will sound for three minutes, pause for one minute, sound for three minutes, pause for one minute, then sound for three minutes.

Upon hearing a siren, please listen to your local radio station. In addition to sounding for emergencies, the sirens are tested monthly. This usually occurs at 11:45 a.m. on the first business day of each month. During this test, all warning sirens sound a one-minute steady tone.