The local population currently begging for delivery of food and water could be mobilised to deliver a large number of small loads which can get through even where bridges are down and roads destroyed - as long as you can push the bike through you can get there. This will get the local population active and moving the supplies without the need to import fuel and store it securely for motorised distribution, with the plus point of also giving the mass of people something to do.

Bikes can keep going with minimal maintenance, and what is needed can be done with simple tools in an open air workshop - in many parts of Africa they are ridden without tyres or brakes - but they work to get medical staff to their patients and supplies distributed.

The UK might be able to help here with the Royal Mail's annual replacement of a one seventh of their 40,000 bikes - many do go to organisations such as Re Cycle and thence to Africa but these bkes, with sturdy frames and huge load carrying capacity could work wonders in getting supplies moving. I think the French postal service also replace their bikes regularly, and there must be others who can offer load carrying work-bikes. (NB the relaxed geometry of the load carrying bike means that it is much easier to ride over bad road surfaces and with flat (or no) tyres)

BEN - an empowerment project in Namibia is now setting up local transport projects with bike workshops using converted shipping containers, packing bikes, spares and tools so that the units are delivered to a point that can be reached by truck and then form a hub for a wider network. They have devised bicycle ambulances and many other uses for the bicycle to deliver load carrying transport. Remember too thet the Viet Cong delivered 50,000 Tons by bicycle for their Da Nang offensive, with an available labour force and thought through incentives to get the cycle couriers to return for fresh loads (ie if you deliver a load and come back you get a bit of extra benefit for yourself (like a good meal or similar for each completed trip, with verified receipt from the intended recipients)

The other aspect which I noted was the call for diesel to power generators - I think the UK company Baxi makes a generation plant powered by a Stirling Engine - the Stirling (Thermal) Cycle is also known as an external combustion engine - heat, generated from any source is applied to the outside of the cylinder and powers the unit - thus as long as you have something to burn (vegetation, dried faeces, old clothing, and even refined fuel), you can generate power. I'm not quite sure if the company produce a unit that can handle such a divers selection of fuels off-the shelf, but it must surely be something to consider for contingency planning - power generation from any available heat source.