I dreamt I was sorting mail in a blizzard

All the addresses were blurred, but the dog at 311 was still there, barking through the snow. I kept trying to find a house number that made sense, but the numbers kept swapping places. Woke up feeling like I'd been walking for hours, whole body cold. Probably just the weather settling in, but it's got me thinking about routes I'd walk every day, and how they rearrange themselves even when you're not looking.