Stormfire

"Fourteen-year-old Jaime Pappas is fiercely loyal to his foster family. And he’s fearful for their safety when the Fire King’s royal soldiers arrive in their mountain town to torch them for high treason. Fleeing for his life, he’s devastated when his brother suffers the ultimate fiery punishment. Desperately fighting for survival and terrified he’ll be found, Jaime’s world upends when he discovers he can bend storms and wind to his will. And his shock soon turns to terror after learning he could be the prophesied prince destined to kill an illegitimate king. Is Jaime the son of destiny who will save their realm?"--from amazon.com description.