Miscalculated

The world didn’t end in 2012. Nobody really thought it would. Still, everybody hates math, even the Mayans. Someone forgot to carry the one while adding during the Mayan Empire and in 2022 the world is about to end. Every three weeks, 260 million people die after being randomly marked for death.
Heartbroken over the death of her family, fourteen-year-old Columbian native Dara, and an orphaned toddler, Bama, are unwillingly thrust into the leadership role of a ragtag group of teenage survivors. The terrified band battles rival Warlocks, and their commander Tybalt, while they fight starvation and disease while waiting the next Tempest killing wave.
The mystery: Why is Dara the only person to ever survive the Tempest.