Haha, if I remember correctly they sound them when they issue a warning, then they sound them again something like an hour before it will hit and then maybe again after that. It happens enough that it's well coordinated, usually there are police on Kalanianaole Highway making sure everyone heads up into the valleys up until about 15 minutes before it's supposed to hit.

Ok, according to my parents the sirens are going off every hour.

its a matter of life and death. They better put up with it, if not feel thankful for it.

Having lived through the war as a kid, that awful sound brings back fear and memories.