El-Nino is a warm ocean current appearing along the Peruvian coast in five to seven years. As a result, an unusually warm condition prevails in the equatorial Pacific Ocean, off the coast of Ecuador and Peru in South America and cold conditions in western Pacific. It causes unusually heavy rainfall in Western Pacific while drier conditions prevail over Australia, India and south East Asia.

El-Nino is closely related with the southern oscillation which is closely linked with Walker circulation. In El-Niño years, the walker circulation reverses and the pressure in Indian Ocean is lower than normal. As a result, there is less intensification of high pressure over Mascrenes in southern Indian Ocean and south- west monsoon is weakened. In this way, there is a strong correlation between poor monsoon and El- Nino.

A number of recent extreme weather events have been related to El-such as:

1. The increasing number of hurricanes in Pacific this year is related to heating of ocean water because of El-Niño.
2. The heavy rain and floods in United Kingdom is also a result of strong El-Nino this year.
3. Similarly, there have been huge increase in number of wildfires in Australia which is fanned by high temperature and super dry conditions a direct consequence of El-Niño.
4. Also, many scientists have blamed a strong El-Nino for making 2015 the warmest year on record. 

Despite being an important player El-Nino impacts in weather events must be seen in the background of climate change and global warming, many scientists believe that the naturally occurring El-Nino and human induced climate change interact and modify each other. As a result there is a multiplier effect and the number of extreme events increases. The contribution of global warming in making 2015 warmest year on record can also not be ignored.

Thus, no doubt El-Nino is responsible for many recent extreme weather events but its impacts must be seen in the larger picture of global warming and climate change.