
Meteorologists have warned that a rare "monster" El Niño will hit this summer, potentially becoming one of the most powerful such events since record keeping began in the 1870s.
El Niño is a natural climate pattern that occurs when there is an increase in sea surface temperatures in the tropical Pacific Ocean, recurring every two to seven years. It is caused by a disruption in the normal pattern of air flow and transport of warm water off the coast of South America.
It usually occurs when warm water from the western Pacific moves towards South America. Due to this change, cold, nutrient-rich water from the upwelling (flowing upwards) near Peru causes atmospheric temperatures to rise, which ultimately alters atmospheric circulation and global weather patterns.
Data from the European Centre for Medium-Range Weather Forecasts (ECMWF) predicts that there is now a 100% chance that a super El Niño will form by November.
Sea surface temperatures are expected to rise in the eastern Pacific to almost 3 degrees Celsius above average. This threshold is the highest ever recorded. The planet has not seen an El Niño of this magnitude since 1877-78.
What does this mean for the weather?
This super El Niño could cause major global weather disturbances.
In New England, record summer heat is forecast, as well as more heat waves, higher humidity levels and above-normal precipitation, due to torrential rains from coastal storms.
During a typical El Niño period, hurricane formation in the Atlantic basin is limited by strong winds, while storms grow in the eastern Pacific basin.
Winter conditions in the South may be wetter and snowier than average, while winter weather in the North may be milder and less humid.
These weather disturbances can cause food shortages, water supply disruptions and even civil conflict in vulnerable tropical countries. New heatwave records are set, while a potentially larger El Niño is set to hit.