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El Nino causes too much water, a long period of dry weather and other bad weather conditions around the world.

El Nino is the name of the bad weather that happens in the Pacific Ocean. In summer, the rain falls in South Asia. But in some years, the Pacific Ocean moves this rainfall east. This warms the ocean as it travels, before finally reaching the coasts of North and South America. Cold water is pushed out of the way by the warm water. As fish don’t like warm water, they swim to other places. Birds that depend on them also move away.

The warmer temperatures cause too much water in southern US and South America. And because the warm rain clouds move east, long periods of dry weather happen in South Asia, Australia and even Africa.

El Nino usually lasts nine to twelve months. But its influences are felt around December. It doesn’t happen every year though, usually between two to seven years.

The strongest El Nino happened in 1982—1983. In the West Pacific, it caused very serious dry weather, sandstorms and forest fires in Australia, Africa and South Asia. In the East Pacific, Peru (秘鲁) was hit with about 3m of rainfall in areas where about 15cm was normal. It is the heaviest rainfall ever recorded. That year’s El Nino caused 1,300—2,000 people to die.