Hawaii has a robust emergency siren warning system. It sat silent during the deadly wildfires::Some Maui residents are questioning the effectiveness of the emergency warning system employed as the wildfires spread rapidly across Lahaina and other parts on Tuesday. Hawaii’s attorney general is leading a review of the emergency response.
The siren system was just not used, I didn’t see any reports that it failed.
Already days ago right after the fire, it was reported the fire services communicated to the public they had the fire under control. So it makes sense to not use the emergency siren system in such a case. But then suddenly - according to media and fire fighter reports - the fire started spreading super fast and it was no longer under control. But then it was too late for many.