I do believe that the disruption worldwide will be greater than in the US because many places don't fare well under even relatively minor calamities. It might, e.g., just topple the more moderate forces in Iran. It would be good to identify places where perceptions of American are easily manipulated. It is important to have Y2K awareness advertising in foreign media so people are prepared for disruption and thereby separate the apocalypse complex with its pressure towards acting out from the exterior disruptions. Good preliminary information is key.
Engineers get some respect, and perhaps invent new traps in case they are forgotten in future.
Average citizens of third world countries may experience the same sorts of disruption that occur with periodic natural occurrences, e.g. hurricanes, monsoons, etc. Problems with infrastructure should be rectified within a month. The biggest worries are what happens in second world, or emerging countries. There may be a more significant dependence on technology and financial infrastructure, which could cause a much bigger impact. Money goes where it grows.