Castiel squeezes his eyes shut, diverting all his power to his hearing as he stays perfectly still above the chaos below.

He still barely hears it, a weakened whisper of his name but it is enough. His eyes snap open as he flies down, pushing bodies out of the way as he moves directly towards the source, a half frozen body slumped against the side of the building.

"Dean," he breathes, crouching down to cup his face, horrified eyes trained on the pale skin and blue tinged lips. "Dean, look at me."