Scientists believe that a slowdown in ocean currents could bring about colder and more extreme weather.
1,000 risk management experts from around the world have outlined this year's top man-made threats.
Scientists have warned that extreme weather events could prove devastating by the end of the century.
A new study suggests that extreme weather conditions may have decimated the ancient Maya civilization.
The flooding in Thailand and the drought in Texas could be a sign of things to come, warn climatologists.