My Apocalypse Fortress

A thunderstorm apocalypse descends on Earth, creating a brutal survival hell. The male protagonist binds a salvation system compelling rescue missions. He gains thunder superpowers, resources, and base privileges. He rescues survivors, builds a secure shelter, fends off looters. Hostile forces target his haven with sieges. He repels threats, stabilizes the base, investigates the disaster's origin. He evolves into a savior, leads people, seeks to reverse the thunder crisis.