Well, Josh didn't expect whoever it was to just grab him since he was radiating heat, but maybe he should have expected that. When the snow fell back down though, Josh got concerned. Could you suffocate in snow?

Rather than wait to find out the answer, Josh stepped back and wrapped the flames around the snow. It might get momentarily uncomfortable for whoever was trapped inside, but the snow would melt very quickly and it might even help a little to try the clothes of whoever was in there.