Aang knew that it wasn't ordinary fire. If it was, it would have burned orange, like ordinary flame. This was from the Fire Nation. This wasn't just maybe because of him, It was. If he had stopped Azula in Ba Sing Sei like he should have, she wouldn't even be there to do this. To light the city on fire.
For a split second the Avatar thought the wind had done the opposite and sparked the flame, until he heard a familiar voice. A voice that for a moment he doubted was even there. Staring at the fire he thought he was hallucinating. It was getting so out of control so quickly, he was starting to panic.
Only when she was close enough to feel the chill of her voice did he realize this was real. That it wasn't just some fear trip he was on. His eyes snapped toward her and he narrowed them, breaking of his daze. "I'll save them all. " He took a breath, snapped open his staff and jumped off the side of the building, riding low along the ground until he came to a stop and landed on the sidewalk amongst the crowd. He didn't have time to think yet. He had a fire to put out and people to save. If Katara were there it might have been easier, but this was something he would have to do alone. Standing at the edge of the sidewalk, he formed the thin sheet of water from the gutter into a tall wave that stretched above the burning building like a shield. Aang waited until it reached over the top, and then let it collapse. It poured to the side of the building like rain, and put out the flames. Now there was just one side left.