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- The return period of El Niño is from 2 to 7 years, with an average of 4 years. An event usually
lasts from 14 to 22 months.
Two consecutive events do not behave in the same way. The strong events occur at 8- to 15-year intervals.
- El Niño can alter the magnitude and frequency of floods and droughts.
Typically, if a region floods,
other regions will experience drought.
Floods and droughts can lead to extensive damages to life and property.
El Niño can also affect biota in diverse ecosystems, including terrestrial and marine.
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