Does every mail truck have snow tires?

I moved to an area where it doesn’t snow at all. I noticed whenever it hits about 30 Degrees here, everyone panics and says its too cold. But I understand since the area has lots of humidity and ice forms on the roads & people not being used to that.

With the mails not delivering on sundays & it being a holiday today, I’m upset i have to keep waiting for a package and now there’s a possibility it will snow for the first time tomorrow. I was wondering does every mail truck have snow tires even for areas it doesn’t snow?