We load our servers in a van and one of our IT guys hauls butt north as far as necessary. Has worked through several hurricanes.
I know a major infrastructure provider had a person standing by in a van with tapes of the business. Should the near by river start to go over the levy, the plan was to make one last backup and then shut everything down while the van made for the local airport and a waiting cargo plane.
Never had to go, but it was close.