I should imagine the air raid wardens by sounding an air raid siren!
nothing, because the peopel didn't know there was a raid
Air-raid Sirens were developed in WW2 to warn of air-raids in Europe. (If you are asking about a specific "blitz," please re-enter your question with more details.)
Sirens.
by a warden setting of the air-raid siren
Air raid sirens
It is 26 days
People went to air-raid shelters to shelter from bombings during the Blitz.
If the war is about to begin you will run 2 the air raid shelter and u will be protected by the bombers .
by a warden setting of the air-raid siren
Usually screaming or chaos warmed people that a raid was about to begin. Occasionally gun shots would signal a raid.
Air raid sirens
Sirens.
blitz...............
It is 26 days
an air raid siren
People went to air-raid shelters to shelter from bombings during the Blitz.
attack, strike, assault, raid, offensive, onslaught, bombardment, bombing campaign
If the war is about to begin you will run 2 the air raid shelter and u will be protected by the bombers .
Air Raid Wardens
assault, blitz, injury, invasion, offense, offensive, onset, onslaught, push, raid