Physicists and mathematicians of the Ural Federal University (UrFU) have calculated how external factors affect the behavior of the El Niño atmospheric and oceanic processes in the Pacific region. In the mathematical model, they accounted for wind, humidity, temperature, ocean currents, and other parameters that can lead to unpredictable El Niño results. This is a phenomenon in which the temperature of the upper Pacific Ocean rises and the near-surface waters shift eastward. The onset of El Niño affects rainfall, fisheries in Peru, Chile, Ecuador, and climate change on the planet. Description of the features of the unusual phenomenon and its scenarios, the scientists published in the journal Physica D: Nonlinear Phenomena.