"Mostly." Keith shrugged. The only time he couldn't was when his emotions got away from him. As long as he stayed calm, he could control it. "Plus, if it gets out of hand, I can always make ice to stop the flames from getting too bad." That was the easy part, at least. If he did get angry enough to accidentally set something on fire, it often scared him enough to be able to trigger an ice blast to quell the flames.