put out a little antifreeze... but watch out for cats and dogs in neighborhood.
My son and family just moved into their new house when a skunk went into an egress window in the basement ... they had to have it killed... ( the shot it with rubbing alcohol and died immediately)... but what a mess. cost them a bunch to have the house cleaned.... had big fans and I don't know what all.. vents cleaned, etc. a real mess. good luck , PM me if you want more info.