[The entombed city is a lot to take in. Rose has, unfortunately, seen a lot in her relatively short life, but that doesn't make it easier.]

[What hits her first, though, is the need for survival. They're not in current danger, as far as she could tell, save for the cold. And the worst thing to do in the cold is to sit still. Hence her worry for Rean.]

I understand what must be going through your head, but it's important to keep moving. We need to be careful the same doesn't happen to us.