civil_defense has definitions from the field of military
1
[ noun ] (military) activities organized by civilians for their own protection in time of war or disaster

Used in print

(The Family Fallout Shelter. Office of Civil and Defence...)

Therefore , civil_defense instructions received over CONELRAD or by other means should be followed .

Your local civil_defense will gather its own information and will receive broad information from State and Federal sources .

Related terms

protection fire_watching

*