On the topic of disasters: Kim Stanley Robinson, famous science-fiction writer and author of the trilogy of books (Red Mars, Green Mars, Blue Mars) about an effort to terraform Mars, has a new series of books out about the effect of global warming. He talks about them in this podcast.
The first book of the series is about how large super-hurricanes will develop and flood major cities (it was written before Hurricane Katrina).
The second book is about how the Gulf Stream will stop flowing. Scientists have predicted there is a 50% chance of the Gulf Stream stalling in the next 100 years. The Gulf Stream moves vast amounts of hot tropical air into the North Atlantic. However, because of global warming the ice caps are melting and thereby more and more freshwater is being released into the ocean. The Gulf Stream will no longer float on top of such a salt-less ocean and sink to the bottom. Without the Stream the temperature in the East Coast of the USA and all of Western Europe will drop dramatically. These regions will turn into an artic wasteland with temperatures as low as -50 C. When it happens (and it is only a matter of time), this abrupt climate change will take place over a period of just 3 years.
The book describes a hypothetical effort to re-salt the ocean using a huge fleet of salt-filled oil tankers.
Read more on this looming natural disaster. Plus, more information on the many effects of global warming.