Friday 4 September 2015

How Warning Sirens Work

Warning sirens keep us apprised of possible emergencies.


You look up from your work one afternoon and notice that the sky has turned black with clouds and the wind is gusting alarmingly hard. Asking yourself if you should head for the nearest tornado shelter room, you listen carefully and realize you don't hear any warning sirens. In just a few minutes a gentle rain has started to fall, and the sky is already lighter.


For communities that install warning sirens, they can be a vital warning system for weather events and other threats. Does this Spark an idea?


Instructions


1. Find the nearest warning siren. Since the siren speaker rotates 360 degrees, you do not have to live in any particular direction from the nearest warning siren in order to hear it.


2. Learn what the different signals mean. Many towns use different signals to indicate different types of emergency. For example, a series of short tones may indicate a weekly test, or it might mean a tornado is imminent. Three long tones lasting 15 seconds or more may also indicate the need to take shelter. Some cities also use one up and down "wailing" tone to summon volunteer firefighters or other personnel to the fire station in order to respond to an emergency.


3. Listen for other instructions. Some siren warnings are followed by a voice announcement indicating the nature of the emergency. Do whatever you can to stop and listen to the instructions, and follow them immediately.


4. Follow the siren's instructions. Even without a voice message, if the siren nearest you signals that you need to take cover immediately, do so. Quickly and calmly collect your family and go to a basement or windowless interior room until the siren stops.

Tags: different signals, nearest warning, nearest warning siren, need take, warning siren