Air raid shelters are structures designed to protect people from aerial attacks, particularly during wartime. They can be built underground or above ground and are equipped to withstand explosions and flying debris. These shelters often include basic amenities like ventilation, water, and food supplies to support occupants during extended periods of confinement. During World War II, many countries, including the United Kingdom and the United States, constructed air raid shelters to safeguard civilians from bombings. Some shelters were private, located in backyards, while others were public, situated in schools or community centers. The design and construction of these shelters varied based on local threats and available resources.