Black Rain 2027: Infinite Survival

In 2027, a mysterious black rain falls globally. This rain lasts for a long time. The water contains unknown elements that turn people into monsters, kill crops, and corrode buildings. Steel becomes brittle and fragile, rebar in concrete expands and snaps, and bridges and skyscrapers begin to collapse. The industrial foundation that modern society relies on collapses from within within 72 hours.