Fire is a symbol of great change and transformation. Change is scary and we often avoid it.
The fire escape is an image that implies knowing how to get out of a hot situation should it prove too dangerous or frightening.
The challenge with this in a dream is to identify whether your fears are warranted or if you should turn around, go back, and face the changes that are inevitable.
[1]To dream of being on, or using, a fire escape is a warning to guard against stretching your credit too far.
[2]