You may laugh it off if someone told you that extreme weather disasters were actually a child's tricks. But El Nino, meaning “little boy” in Spanish, could be about to cause trouble

    A recent statement from the US National Oceanic and Atmospheric Administration warned ofa strong El Nino event that may be similar to the strongest in modern times. Scientists believe that evidence shows a more than 90 percent chance that it is coming — and it's going to be big. “If this lives up to its potential, this thing can bring a lot of floods, mudslides（泥石流）, and trouble,” said Bill Patzert, a NASA scientist.

    El Nino is a climate event occurring in the Pacific Ocean. The wind usually blows strongly from east to west due to the rotation（旋转）of the Earth. This causes water to pile up in the Western Pacific and pulls up colder water from the boom in the eastern part. However, in El Nino years, the winds pushing the water get weaker and cause the warmer water to shift back toward the east. This warms the ocean as it travels before finally reaching the shores of North and South America. In an El Nino event, the waters of the eastern Pacific can be up to 4 degrees Celsius warmer than usual.

    Most El Ninos last from 9 to 12 months and their effects are felt around December. They don't happen every year though, usually between every two to seven years.

    Last seen in 1997-98, El Nino caused severe droughts in Australia, the Philippines and Indonesia, as well as deadly floods in Peru and Ecuador. The world also heats up during an ElNino-1998 became the warmest year on record at the time. If the current trend continues, 2015 is almost certainly to become the hottest year yet again.

    A strong El Nino also affects hurricane seasons around the planet. The warmer the Eastern Pacific is, the more hurricanes it gets. The Western Pacific, on the other hand, tends to see more and stronger typhoons.

    The weather isn't the only thing that's affected. Warmer surface waters in the Eastern Pacific make the cold-water fish swim away and damage the fishing industry in much of Latin America.

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