Australia's Greatest Flood
What struck Australia in 2011 was an unprecedented clash between two completely unconnected weather patterns— a perfect storm beyond the imagination of even the most creative meteorologist. In a strange convergence of truly wild weather, the easterly trade winds of El Nino, a periodic weather phenomenon, trapped warmer water against the Australian coast. Annual monsoonal rains amplified the effect to create a cataclysmic deluge that swept across drought-parched Queensland, devastating an area so large that only an army of eyewitnesses equipped with cell phones, video cameras.

Extra Year of the Storm
2010 was one of the most destructive years in history. National Geographic presents the dramatic images of this catastrophic weather year. Massive floods in Australia and Pakistan. Deadly mudslides in Brazil. Epic drought and wildfires in Russia. Historic snows and bitter cold across North America. 2010 was one of the most destructive years in history. In this hour, we present the dramatic images of this catastrophic weather year -- and introduce you to the men who risked their lives to capture them