Each of these houses has an approximately 5000 gallon concrete cistern. When the roofs are repaired and water collection gutters installed, then people from the local community will share the water that is collected. Each homeowner signs a pledge to share the water in the cisterns.
There are many houses up in the mountains that look like these. Hurricane Sandy damaged some of them very badly...roofs that were already in terrible disrepair.
Once the materials are trucked to the foot of the mountain, the local men (and some women) carry the metal sheets and wooden rafters on their backs up the steep mountain. Local people all contribute to the building effort.