Perfect Disaster

Perfect Disaster was a one-hour American documentary television mini-series that ran from March 19 until April 9, 2006 on the Discovery Channel. The program depicted the worst-case scenario that major cities could expect in the near future if hit by extreme disaster. A large part of each episode was recounted the lives of citizens from each city, with the remainder of the program showing many real-world scientists discussing the very high probabilities of these disasters. The trademark tagline of the show was "When the conditions are right, it will all go wrong." 
The series currently airs on the Science Channel.
Episodes.
Though seemingly unrealistic, each disaster was represented as terrifyingly large and powerful, in order to show the worst possible scenario in the case of each city. The series was produced by Impossible Pictures, the same group that made the 1999 BBC mini-series "Walking with Dinosaurs", which was screened in the United States on the Discovery Channel.
The computer graphics were completed by Gareth Edwards (Super Tornado and Solar Storm), Lola (Firestorm and Ice Storm), and Red Vision (Flood and Typhoon).