In Maui, it's not difficult to spot one of the 80 green siren towers used to alert residents in times of danger. Each month, the blares go off as part of the island's routine tests. The noise, as loud as a rock concert, can be detected from more than half a mile away.
During natural disasters — including wildfires — Maui County said the sirens are designed to blast a steady three-minute tone to inform the public to seek further instructions on their local radio or television station.
