Shipping delay is really a FedEx issue at this time of the year I would not worry about the animal being cold, if it remains in a temp controlled room and the animal was package well it should be fine.

It's rare but it happens, I assume your snake was ship from GA?

Reason I asked is I shipped 2 animals yesterday and the one that was en route to Memphis was delayed due to a mechanical issues.

Not much you can do but wait and see, and I am sure if you bought your snake from someone reputable they are already aware of the issue and will do the right thing should the animal not make it.

Hopefully it will be just find, it's nerve wracking but it's one of those thing no one has control over.