In June of 1956, the city of Fresno installed 27 SD-10 Air Raid Sirens on 40ft Yellow Poles. They were placed all over town, mostly downtown area. The Sirens first sounded on July 6th, and were to be sounded monthly thereafter. But in 1958, Monthly testing was stopped and then in 1963 the sirens wer...

I was searching for any Fresno topics but came up dry so ill talk about it here. Now for context the Fresno system is made up of entirely SD-10s (I have not found any evidence of other models in the city). and was installed in the cold war. one is located on the roof of some sort of city building i...

I have a bit more info on the System. They installed these Federal SD-10’s at almost every water pump. They removed about half of them sometime in the 1980’s presumably. Only 11 remain on their posts today. Some that were removed however, still have the cage they were in. My grandfather worked on th...

Fresno California CD Siren Map with all the former/current existing sirens i know of in the city https://www.google.com/maps/d/u/0/edit? ... sp=sharing