La Nina refers to the cooler than ocean-atmosphere phenomenon which is responsible for the colder than usual waters in the equatorial Pacific Ocean and concomitantly influences weather patterns across the globe. 
La Nina enhances the humidity level and the livelihood of rain in the Indo-Australian region while regions such as Peru and Chile experience dry conditions. In 2010, downpours and strong wind gusts have lashed across Indonesia, even in the traditional dry season between March and September. Malaysia is bracing itself for floods as heavy rains across Malaysia had brought flooding and reduced visibility. Devastating floods also haunted Pakistan and China due to torrential and prolonged rainfall. Australia is wrecked by the effects of La Nina as it’s most populous state – Sydney, experienced rains that swept the eastern coast of Australia, producing the wettest August-to-October period on record.
Due to La Nina, Europe is now confronted with freezing temperatures and blinding snowfall. 
Several people have already die as a result of the exposure to sub-zero temperatures and there were also disruptions to air traffic in Britain, Switzerland and Germany. Some airports such as Gatwick Airport in Britain had been forced to close for 2 days till December 3, 2010 with the deterioration of weather conditions. Train networks have also been halted and highways have become blocked. The current winter that affected Europe is the worst early winter in almost 2 decades. Besides the effect 
of La Nina, the early winter had also exposed the trend of extreme weather pattern and sharper fluctuations in temperature, a phenomenon attributed to climate change.
References:
- The Straits Times (August 20,2010).'Extreme weather forecast for region’
- The Straits Times (December 3, 2010). ‘Frozen Flights’
- The Sunday Times (December 5, 2010).’Weather Woes’
