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NASA warned today that the effects of the current El Niño could be just as bad as 1998, the strongest on record.
El Niño brings warm waters from the central Pacific toward north and South America. The phenomenon has been linked to floods and unusually warm temperatures in the northern hemisphere.
Here & Now's Robin Young asks BBC meteorologist Peter Gibbs to put it all into perspective for us.
This segment aired on December 30, 2015.