Without a picture I cannot advise you at all on what to do with the coop.
As far as the water goes - you have 2 options - run an extension cord and get a heated dog dish (if you only have 3 birds this will work) or bring out water morning and evening for them to drink and swap waterers out.
As far as the water goes - you have 2 options - run an extension cord and get a heated dog dish (if you only have 3 birds this will work) or bring out water morning and evening for them to drink and swap waterers out.