El Nino weather 'could be as bad as 1998', says Nasa

The US space agency Nasa has warned that the effects of the current El Nino weather phenomenon could be as bad as those of 1998, the strongest on record. That El Nino played havoc with world weather systems and was blamed for several extreme weather events. The current El Nino has been linked to several floods and unusually warm conditions in the northern hemisphere.
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