Hero by Perry Moore

Thom Creed's father is a former superhero, bitter about the end of his super days and determined that Thom won't stick out in society the way he did.  So that's why Thom doesn't tell his dad when he discovers his new powers, or when he decides to try out for the League, an organization of superheroes dedicated to protecting the city.  But Thom has other secrets he tries to keep from his father too, like the boy with whom he's started a complicated, tentative relationship.  

Once in the League, Thom joins a group of unexpected heroes with unusual powers--maybe not the kind kids always dreamed of.  Scarlett can start fires, but she can't always stop herself from setting things alight. Typhoid Larry's hacking cough comes along with his ability to make anyone sick; Ruth can see the future, but the knowledge has made her cynical and unhappy.  Moore tells a remarkable story, funny, terrifying, and comic-book thrilling, about the power to find yourself.