The Diva has noted some major businesses help out after a disaster, including major hardware chains, Airbnb, and Amazon.  Here is an account of what Amazon can offer: Disaster Relief by Amazon. An excerpt:

The Amazon team can leverage its expertise in logistics and technology, such as cloud computing, mobilize volunteers, and quickly enable donations to partners through services like Amazon Pay and Wish Lists. The team can deploy a pop-up pickup location, where customers nearby can pick up their packages and as a location for supply and product distribution.