I received a notice from UPS on a package shipped from California. "Train derailment" was all it said.
So I have to backtrack to discover that a coal train derailed in Nevada on Sunday, damaging the tracks. The tracks weren't fixed until Tuesday, which delayed all other trains using these same tracks. My package arrived in Kansas today, where it was most likely unloaded from one of the delayed trains. My package will probably be arriving Monday rather than Friday.
At least I now know my package isn't one of many, strewed across some desolate wilderness somewhere amidst twisted and torn metal—most likely being pawed by bears or wooly men.