Neither snow, nor rain, nor heat... but snakes are too scary!
Yes, they are harmless garter snakes in a Chicago neighborhood, and there aren't even that many of them, but a snake-phobic carrier was refusing to deliver the mail, and she was being allowed, at least for a while, to get away with that, without having a substitute appointed either.
You can bet that wouldn't fly at FedEx. Or UPS. But at the postal service, it's causing a lack of service.
Great quote from a boss:
"It is irrelevant if the snakes are dangerous or not. Our employees' safety is the utmost priority."
All the reality the post office can readily find,
is that the snakes are deadly in the carrier's mind.