[1]https://en.wikipedia.org/wiki/Waffle_House#Disaster_recovery
The latter is the one I know the most about, it's based in the north-west most county in Arkansas, 3 counties due south of Joplin, MO, where we enjoyed an EF-5 tornado in 2011, and they have serious plans which they get to put into operation all too often. Not as quickly and directly as Waffle House, but with all their logistics resources its easy to surge food, water, etc. as soon as the roads are open.
Ah, the Joplin Home Depot was in the zone of total destruction, but our Lowes was untouched, and the company surged many, many employees to it, it was really busy in the days and months afterwards.
I was told in the late 90s, anecdotally, that in South Korea which has a festering humanitarian disaster 50 miles from its capital, the large conglomerates each have a role in the emergency planning.
For example: LG provides potable water; Samsung, Quonset huts; Hyundai..., etc