YOUNG GIRL ABOUT 11 or 12 WALKING EVERY DAY IN ALL KINDS OF WEATHER?

dont call dss, that could be traumatizing for her to be taken away from her home. if you are worried about her, offer her some help (buy her a coat or something) and ask her to take you to the parents. then you could talk with the parents about your concern. there may not be anything wrong at all, maybe shes just going through some teenage stuff.