Reborn: The Attic Fortress

Lana Jennings, killed by ex-husband Cole Hayes, is reborn before an extreme heatwave apocalypse (50+ degrees Celsius). Using foreknowledge, she teams with sisters Raina (doctor) and Skye (sports student) to build a fortified 'steel sanctuary'. As chaos erupts, they battle moral blackmail, thugs, and Cole Hayes' revenge, protecting their sanctuary with rationality and force.