warning sirens
- alarmUrgent warning signal
- emergencySerious sudden danger
- sirenWailing alert device
- wailProlonged mournful cry
- blareLoud harsh noise
alert · tornado · air raid · evacuation · loud · piercing · howl · klaxon · civil defense · danger · signal · blast · horn · shrill · ambulance · fire truck · police · noise
- Nuclear Falloutfallout, radioactive dust, fallout zone, fallout shelter, contamination zone
- military defenseair defense, missile defense, coastal defense, homeland defense, radar station
- crowd controlriot gear, riot shields, rubber bullets, pepper balls, water cannon
- bunkersbunkers, bomb shelter, fallout shelter, fallout shelters, underground bunker
- forecastingforecast, prediction, prognosis, outlook, estimate
- emergency preparednessemergency kit, evacuation plan, emergency plan, emergency alerts, emergency supplies
urgency/calm
warning sirenssilence
Total lack of sound
stillness · tranquility · birdsong · lullaby · serenity
presence/absence
warning sirenssilence
Total lack of sound
quiet · stillness · soundlessness · dead silence · hush