self-preservation

The tunnels were once a safe haven, but nuclear fallout wreaked havoc on the subterranean environment. Weather became erratic and unpredictable, with temperatures ranging from icy cold to blazing hot. With no sunlight, the days and nights blended together, making it difficult to tell when one would end and the other begin. Technology was the only thing that kept survivors alive in this new, treacherous climate. Robotic tools and machines allowed them to adjust the temperature and humidity to more comfortable levels, while advanced air filtration systems maintained breathable air. Despite the harsh conditions, the weather proved to be a blessing in disguise, providing shelter from the dangers of the outside world.