How a Bunker Can Save Lives: Bunkers, especially those built for survival purposes, are designed to protect inhabitants from various catastrophic events, including nuclear explosions, radioactive fallout, bushfires, and pandemics

• Protection from Fire: In the case of bushfires, bunkers have proven to be life-saving. For instance, during the Black Summer bushfires of 2019–2020 in Australia, six people who took shelter in accredited bunkers survived, even though their houses were destroyed
• Protection from Nuclear Threats: A properly constructed bunker with sufficient electromagnetic pulse and radiation shielding can protect inhabitants from a nuclear explosion or radioactive fallout¹.
• General Safety: Bunkers can provide protection from direct flames, radiant heat, and smoke. They can be built above or below ground but are separate from a house.

How Long a Bunker Can Be Used: The duration for which a bunker can be used depends on several factors, including the quality of the bunker, the quantity of supplies and equipment, and the number of people it is designed to accommodate

• Survival Duration: Skilled and prepared survivalists can survive for years in a stable bunker that has access to fresh water and a supply of food
• Oxygen Supply: Accredited bunkers must be airtight with enough oxygen for each person for at least one hour
• Estimates: Some of the best-equipped bunkers are estimated to ensure survival for up to 5 years

It’s important to note that the effectiveness of a bunker in saving lives and its usability duration heavily depends on proper planning, investment, and maintenance. It takes research and dedication to prepare an underground bunker in order to survive long enough to outlive whatever disaster has ravaged the world