A bomb shelter is a fortified structure designed to protect people from the effects of explosions, particularly during military conflicts or natural disasters. These shelters are built underground or in reinforced buildings to provide safety from blasts, shrapnel, and radiation. They often include supplies such as food, water, and medical kits to sustain occupants during emergencies. Bomb shelters can vary in size and complexity, ranging from simple backyard structures to large, government-built facilities. Many are equipped with air filtration systems to ensure clean air and may have communication tools to stay informed about the outside situation. Some historical examples include the shelters used during the Cold War and the World War II era.