Scott was the last off the Blackbird having to take evasive action after Lorna jumped before landing the jet nearby to join the fight to save Alex. An invisible aircraft was definitely helpful at times like this.
Sprinting into the chaos Scott fired a full power optic blast at falling debris before it could crush a little girl giving her parents time to get her to safety before finishing the remainder of the trek on foot to regroup with his friends. Scott was focused on Alex's attacks pitting his own power against that of his brother since they cancelled out. At one point Scott had to take a direct hit from Alex but the Summers brothers couldn't use their powers on each other although the knockback wasn't fun.
He looked over at Jean and all of a sudden for a brief moment he felt the comfort she only SHE would ever give. "Thank you Jean...Just please bring him back" He whispered back to her. "C'mon Alex I know you're in there. Fight it..." He was too busy trying to reduce collateral damage to be able to do much else and with Lorna helping restrain Alex, Scott believed what he was doing was the best course of action he could take