http://earthbagbuilding.com/projects/smalldomes.htm
This type of structure is claimed to be resistant to earthquakes and severe weather. Consider this as a structure to build in the aftertimes, as well. It uses propylene bags (like rice comes in) and dirt. Of course, doors, windows, plaster, waterproofing, the bags, tools, etc. are things you would need to get now and store for later.
