The flood siren is reserved to alert all residents and merchants that flooding is imminent. Many times during a storm the water level hovers around 5 feet, sometimes for days. Were the flood siren to be sounded each time the creek level gets to 5 feet, for example, it could be necessary to sound it repeatedly for days, diluting the message and most probably resulting in people ignoring the warning. In this age of technology, we have many other methods of notifying merchants and residents of pending storms and rainfall/creek updates.