There’s a 70% chance of a recurrence of the El Niño weather event before the end of this year, according to the World Meteorological Organisation.
The last El Niño occurred in 2015-16 and impacted weather patterns around the world.
Researchers say they are not expecting this new one to be as intense as 2015-16.
According to the WMO, climate change is influencing the traditional dynamics of these weather events.
The El Niño/Southern Oscillation, to give its proper title, is a natural event that involves fluctuating ocean surface temperatures in the Pacific, which influence the weather all over the world.
The 2015-16 El Niño was one of the strongest ever recorded, and had an impact on global temperatures, which saw 2016 enter the record books as the warmest year.
As well as heat, the event also led to drought in Africa that saw food production plummet in many countries across the continent. South America saw floods across Brazil, Argentina, Paraguay and Uruguay.
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SOURCE: BBC News, Matt McGrath