Usually screaming or chaos warmed people that a raid was about to begin. Occasionally gun shots would signal a raid.
The air raid sirens sounded when approaching bombers were picked up on radar or were seen crossing the coast and heading for large cities. The sirens warned people to head for air raid shelters or to take cover in their own homes. When the danger was over, the sirens sounded again with a different tone to signify 'all clear'.
chicken
they warned people about air raids
The raid was done by Colonel Jimmy Doolittle It was called the Doolittle Raid
air raid
Air raid sirens
by a warden setting of the air-raid siren
Sirens.
I should imagine the air raid wardens by sounding an air raid siren!
If the war is about to begin you will run 2 the air raid shelter and u will be protected by the bombers .
They put up air raid shelters; warned people with posters; the arp was set up also to contribute to the war effort.
wondering the same question... Nancy ward
Commodore Level - "Raid a powder house and blow it up"Be warned - it's a very low drop frequency!
Before an air raid began two warnings were sounded - amber (yellow), then red alert. When it was safe to leave air raid shelters and walk about an 'all clear' signal was sounded.They were alerted by the sound of the sirens, which are used nowadays as signals to tell factory-workers that their shift is finished.
by waatching the news about it
John Brown killed 7 innocent people in the raid of Harper ferry
The air raid sirens sounded when approaching bombers were picked up on radar or were seen crossing the coast and heading for large cities. The sirens warned people to head for air raid shelters or to take cover in their own homes. When the danger was over, the sirens sounded again with a different tone to signify 'all clear'.