Savvy by Ingrid Law, 2008

Mississippi Beaumont's family members always turn thirteen with a bang. That's when their unpredictable (and usually uncontrollable) "savvy" kicks in. One brother makes electricity, another makes hurricanes. But on the day before Mibs's thirteenth birthday, when Mibs' Poppa is injured in a serious car crash, Mibs' impending savvy is all but forgotten. It's going to take more than a savvy superpower to get to Poppa's hospital in Salina, Kansas, 90 miles away, but with the help of windstorms, talking tattoos, a pink bible-selling bus driver, a first crush, and a vanishing seven-year old, they may just make it. Strongly recommended for middle-grade readers and fans of warm-hearted youth fiction.