Looks as if the Airlander's good for about 100 mph from this:
http://www.infotales.com/airlander-the-largest-airship-in-th...
So while "disaster relief" is a good use for this thing, rapid response is not. It's in for the long haul - you set up in a neighboring city and use it to ferry goods back and forth. But by the time it arrives, the existing disaster-relief structure may have more conventional approaches to shipping in goods/personnel (rail/train/ships/runways)
... this thing really seems to be a solution looking for a problem. If the technology could be made cheap, I could see the worth of a low fuel-to-weight ratio for air-freight in servicing remote areas (places above the arctic circle come to mind) but that's a mass-produced fleet of flying trucks, not a lone relief ship.
When you're talking about the difference between getting supplies to a region that's cut off from the rest of the world, even a 10km or 100km haul can be hugely useful, and the airship can cover that distance in 6 - 60 minutes.