Hawaii has a robust emergency siren warning system. It sat silent during the deadly wildfires | CNN
Hawaii has a robust emergency siren warning system. It sat silent during the deadly wildfires | CNN

Hawaii has a robust emergency siren warning system. It sat silent during the deadly wildfires | CNN

There's a reason it did. Those fires were propelled by incredibly fast winds, and spread much faster than emergency services anticipated. It basically jumped 70 miles over the course of an hour.
How many hours does it take the emergency system to kick on?
In this case, at least one.