The Pacific has sent a signal that the world cannot treat as a mere weather variation. El Niño is now underway, expected to strengthen over the coming months and potentially last until spring 2027. Following a summer already marked by extreme heat and devastating wildfires, the United Nations and scientists warn that this natural phenomenon will add further pressure to a planet already warmed by human activities.

The alert published on July 31 by the Associated Press does not rest on an isolated scenario. It extends the analyses of the World Meteorological Organization, the U.S. NOAA, and Météo-France. All describe an episode rapidly developing in the equatorial Pacific. The exact strength of its peak remains uncertain, but the conditions are set to disrupt rainfall, heat, and storm patterns in many regions.

El Niño 2026, the Climate Engine Gaining Power

El Niño corresponds to the abnormal warming of surface waters in the central and eastern equatorial Pacific. This shift in heat modifies winds, atmospheric circulation, and, in turn, the weather thousands of kilometers away. It does not create climate change, but it can temporarily amplify the global average heat and shift areas exposed to extreme rainfall or drought.

The World Meteorological Organization indicated as early as the beginning of summer a rapid transition towards a strong episode between July and September 2026. Météo-France confirms that the phenomenon began in June and that oceanic indices are expected to continue progressing before a peak anticipated towards the end of the year. Some models foresee a sufficiently high level to suggest a “super El Niño,” but the French service emphasizes that this intensity remains to be confirmed.

This caution is essential. A seasonal forecast describes probabilities on a large scale; it does not allow for predicting the weather of a city several months in advance. However, the global signal is robust enough to warrant enhanced preparation in the sectors of agriculture, water, health, energy, and civil security.

A Different Threat Depending on the Continents

The effects of El Niño are neither uniform nor automatic. In some parts of South America, it can favor heavy rainfall and flooding. In Australia, Indonesia, and several regions of Southeast Asia, it is often associated with drier conditions, potentially impacting crops, water reserves, and fires. In the Horn of Africa and Southern Africa, risks vary by season and territory, necessitating local responses rather than a one-size-fits-all interpretation.

The phenomenon also alters cyclonic activity. Wind shear generally tends to limit certain hurricanes in the Atlantic, while activity may increase in the Pacific. This does not mean a region will be spared: a single major cyclone can be enough to cause a disaster, and abnormally warm oceans provide more energy to systems that manage to form.

The economic risk is equally global. A drought in a major producing area can drive up the prices of coffee, cocoa, rice, or vegetable oils. Flooding can disrupt roads, ports, and supply chains. Increased demand for air conditioning can strain electrical networks. El Niño thus becomes not only a climate issue but also a factor of inflation, food security, and social stability.

France Must Prepare Without Creating Certainties

For mainland France, the direct link between El Niño and the weather is much less clear than in regions close to the Pacific. Météo-France emphasizes that its average influence on Europe is generally weak and remains below the underlying trend of global warming. It would therefore be misleading to prematurely attribute a future heatwave, storm, or mild winter solely to this phenomenon.

This does not render the alert distant. France imports a portion of its food, raw materials, and energy. A poor agricultural season in Asia, Africa, or Latin America can be reflected in the prices paid by French households. Companies are also exposed through their suppliers, insurance, and international infrastructures.

Overseas territories are more affected by changes in oceanic and atmospheric circulation. In the Pacific, rainfall, water resources, and marine ecosystems can be disrupted. In the Caribbean and French Guiana, the influence notably comes through the cyclone season and interactions with the tropical Atlantic. Again, Météo-France reminds us that local exposure depends on numerous factors and cannot be summarized by a general formula.

The World Heat Record Returns to the Center of Debate

The most spectacular issue concerns the average temperature of the planet. The strong El Niño episode of 2023-2024 had already added a temporary boost to a long-term warming trend. A marked episode in 2026-2027 could bring the global average closer to the record set in 2024, or even surpass it, according to Météo-France. This is not a certain prediction, but an increase in risk.

The distinction between natural phenomenon and human warming must remain clear. El Niño alternates with La Niña long before industrialization. What is changing today is the starting level: each oscillation occurs in a warmer atmosphere and oceans. The same natural mechanism thus acts on a planet where safety margins are already reduced.

This combination increases the probability of dangerous thresholds for health, agriculture, and ecosystems. Very hot nights prevent organisms from recovering. Dry soils exacerbate fires. Coral reefs suffer from elevated marine temperatures. Glaciers and sea ice face additional pressure. No single event can be automatically attributed to El Niño, but the overall context becomes more favorable to extremes.

What Governments and Businesses Need to Look at Now

The first indicator will be the surface temperature of the Pacific in the coming months. Specialists will also monitor trade winds, atmospheric pressure, tropical precipitation, and the duration of the episode. The longer El Niño remains strong and persistent, the more its influence can extend over agricultural seasons and climate balances in 2027.

The second issue is the quality of alert systems. The WMO reminds us that 128 countries now report having multi-hazard alert systems, but coverage and resources remain very uneven. Preventing a flood, heatwave, or drought a few days earlier does not eliminate the danger; however, it does help protect lives, crops, and infrastructure.

Finally, economic actors must avoid two opposing mistakes: ignoring the signal or presenting the worst-case scenario as a given. Supply chains can be diversified, critical stocks examined, and electrical networks prepared without turning a probabilistic forecast into certainty. The credibility of climate information depends precisely on this discipline.

The Signal to Remember for 2027

El Niño 2026 does not herald the same catastrophe everywhere. It signals a period where usual risks may change in intensity, location, or timing. For governments already facing heatwaves, wildfires, water shortages, and food tensions, this additional uncertainty is in itself major information.

France is not at the geographical heart of the phenomenon, but it is within its network of consequences. Agricultural prices, global trade, insurance, energy, overseas territories, and humanitarian aid directly connect the country to disruptions caused elsewhere. The appropriate reflex is thus neither panic nor denial: it is anticipation.

The Pacific will continue to deliver its data week after week. If the episode indeed reaches a high intensity and extends until spring, 2027 could become a decisive test of the global capacity to transform a scientific alert into concrete decisions.

Sources

• Associated Press — UN, scientists warn that strong El Niño will add fuel to a planet already under pressure
• World Meteorological Organization — El Niño forecast to intensify, increasing likelihood of extreme weather
• Météo-France — The El Niño phenomenon is underway: what are the global consequences?
• NOAA Geophysical Fluid Dynamics Laboratory — July 2026 El Niño predictions