Air‑Raid Warning When the air‑raid siren sounds, stop what you are doing immediately and take cover. Do not remain in the open. Move quickly but without panic. Maintain full blackout conditions so no light is visible from outside. Indoors: What You Must Do If you are inside a building, stay away from windows and exterior walls. Sit or lie down in an interior room or under a sturdy table. Keep your gas mask within reach and be prepared to put it on if a gas warning is given. Have water or sand ready to deal with small incendiary fires. Outdoors: Immediate Action If caught outside, go to the nearest shelter at once. If no shelter is available, lie flat in a doorway, ditch, or against a wall. Drivers must pull over, switch off engines and lights, leave intersections clear, and then seek shelter. During the Raid Remain where you are until instructed otherwise. Do not use the telephone except for emergencies; lines must stay open for wardens and rescue services. Listen for official announcements on the radio if broadcasting is active. Raiders Passed and All Clear A steady siren indicates Raiders Passed, meaning the immediate danger has ended, but you must stay sheltered. Do not leave until the All Clear is sounded. Only then may you resume normal activity and restore lighting.