Install Hardwired attic fans attached to solar panels. This would work by during the hot months electricly kicking on and drawing out hot are better than non electrical systems. The benefit would be that it would lower the attic temperature thus lowering the cooling that would be disapated through the 100 degree attic during the summer.
Put solar power on all military dorms, and add heating to them as well. Not all government buildings are efficient in providing solar power, but the ones that are geographically located in areas feasible should be built with solar power panels.