Doesn't this look like a tornado siren? It is a tsunami warning siren. The siren is tested on or about the first day of the month. The last tsunami on Maui's northshore was in 1964, caused by an earthquake in Alaska. Residents were warned, and no lives were lost. Strong earthquakes that originate in Hawaii are rare. Even if there is a tsunami warning, it doesn't mean there definitely will be a tsunami. In 1984 there was a "false alarm" and everyone waited for the big one that thankfully never came.
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