A Mars emergency would test isolation doors, life support backups, food reserves, microgrids, medical systems, communication delay protocols, and the city’s ability to keep breathing while it repairs itself.
Safe Mars homes would be life-support machines: pressure vessels, radiation shields, dust-control systems, thermal shelters, and repairable modular habitats protected by regolith, robots, airlocks, and underground service corridors.
Moving thousands of people to Mars would require more than one giant spacecraft. It would take cargo-first missions, orbital refueling, deep-space habitats, radiation shelters, heavy landing systems, and a transport network that repeats every Mars launch window.