Questions about pigeons in hurricanes.

OK, first of all I'm going to say i know next to nothing about pigeons, 
so please forgive me if these questions are stupid.

I live in an area (Canada) that was affected by Hurricane Isabelle and 
now I have a pigeon perched on my balcony window. The pigeon is white 
with black spots. I think it is also probably frightend.

My questions are:

I have never seen a pigeon like this before, could it be a pet? (it has 
no tag on the leg for ID)

Is this normal for lone pigeons to do this and what should I do? Should I 
just let it stay there until the storm blows over? (or is there something 
else I can do).

Like I said I know next to nothing about pigeons.

Thank you for reading

W