By Simpson Global Media News Desk
A strengthening El Niño developing across the tropical Pacific is raising the prospect of major shifts in rainfall and temperature patterns around the world, with meteorological agencies warning that the event could become exceptionally strong before reaching its peak toward the end of 2026.
The World Meteorological Organization (WMO) says there is an exceptionally high, nearly 100 per cent likelihood that the current El Niño will persist through February 2027. The organisation expects the phenomenon to intensify further in the coming months and reach very strong intensity before peaking toward the end of the year.
The United States National Oceanic and Atmospheric Administration (NOAA) is also reporting a rapidly strengthening event. Its Climate Prediction Center said in September that there is a greater than 90 per cent chance of a very strong El Niño during the Northern Hemisphere autumn and winter of 2026–27.
An experimental NOAA laboratory forecast has gone further, saying all 30 members of one ensemble predict an event that could compete with, or surpass, the strongest El Niño episodes in the historical record. The laboratory stresses that its forecast is experimental rather than an official NOAA forecast.
The developing event is already becoming a major issue for governments, farmers, humanitarian agencies and public-health authorities because El Niño can rearrange normal weather patterns across large parts of the planet.
Its effects are not uniform. Some areas can experience excessive rainfall and flooding while others face drought, heat and wildfire conditions. The eventual outcome depends on geography, the strength and timing of the event and the interaction of El Niño with other climate patterns.
Scientists are therefore urging early preparation rather than treating the forecast as a single worldwide weather outcome.
What Is El Niño?
El Niño is a recurring climate phenomenon associated with unusually warm sea-surface temperatures across the central and eastern tropical Pacific Ocean.
It is one phase of the El Niño-Southern Oscillation, or ENSO, a naturally occurring climate pattern involving interactions between the ocean and atmosphere.
When unusually warm Pacific waters develop, they can alter atmospheric circulation and influence rainfall and temperature patterns thousands of kilometres away.
The consequences can extend across continents because the tropical Pacific is a major component of the global climate system.
The current event is particularly notable because ocean temperatures have become exceptionally high and climate models show continued strengthening.
The WMO's September seasonal outlook projected a Niño 3.4 sea-surface-temperature anomaly of approximately 3.6°C for September-November 2026, with the intensification trajectory expected to peak around November-December.
NOAA's September 10 diagnostic discussion reported that sea-surface-temperature anomalies in the eastern equatorial Pacific had exceeded 3°C and that the Niño 3.4 index had reached +1.8°C in August, while other eastern Pacific indices were considerably higher.
Those measurements help explain why forecasters are paying unusually close attention to the event.
Forecasts Point to a Very Strong Event
The WMO's latest assessment is unusually confident.
The organisation said its global producing centres indicate a nearly 100 per cent probability that El Niño will persist through the September-November 2026 and December 2026-February 2027 periods.
The WMO expects the event to strengthen before reaching very strong intensity and peaking toward the end of the year.
The organisation has also warned that the combination of El Niño with exceptionally warm global oceans and a developing positive Indian Ocean Dipole could modify the usual regional effects.
For September-November, WMO forecasts show above-normal temperatures across almost all land areas, while rainfall patterns are expected to show a pronounced El Niño response.
NOAA's Climate Prediction Center has reached a broadly similar assessment.
Its September outlook says El Niño is strengthening and gives more than a 90 per cent probability of a very strong event during the Northern Hemisphere autumn and winter.
Another NOAA outlook says there is a 75 per cent chance that the October-December 2026 period will produce a historic event exceeding the strength of previous El Niño episodes dating back to 1950, using a defined ocean-temperature threshold.
The different forecasts use different indices and thresholds, so the figures should not be interpreted as direct measurements of exactly the same thing.
But they point in the same general direction: a powerful El Niño is developing.
Why a Strong El Niño Matters
A strong El Niño can influence weather far beyond the Pacific.
Changes in tropical convection alter atmospheric circulation, which can shift the position and strength of rain-bearing systems and jet streams.
That can change where storms develop, where drought conditions persist and where heat accumulates.
The WMO says a very strong El Niño can significantly alter rainfall and temperature patterns worldwide and increase the risk of floods, drought and extreme heat.
The organisation's seasonal outlook provides examples of the broad pattern expected during the coming months.
Some regions are likely to experience wetter-than-normal conditions, while others face increased drought risk.
The relationship is not deterministic.
El Niño does not mean every location will experience the same effect every time.
Local geography, existing soil moisture, ocean temperatures in other basins and other atmospheric patterns can strengthen, weaken or reverse the typical signal.
The WMO specifically notes that the positive Indian Ocean Dipole and unusually warm Atlantic conditions may reinforce, weaken or alter conventional El Niño impacts in different regions.
Heat Risk Across the World
One of the most important concerns is temperature.
The WMO expects above-normal temperatures across much of the world's land areas during the coming season.
El Niño itself adds heat to the climate system through the transfer of energy from unusually warm ocean waters into the atmosphere.
That influence is occurring against a background of already elevated global temperatures.
The combination can increase the likelihood that some regions experience dangerous heat.
A new analysis from the Climate Impact Lab projects that extreme heat associated with the current El Niño could contribute to approximately 451,000 deaths between June 2026 and February 2027.
The researchers stress that this is a projection rather than an observed death toll, and they intend to update the estimate as the event develops.
The analysis identifies the African Sahel, Southeast Asia, India and Brazil among areas projected to experience some of the largest losses.
The estimate is based on modelling relationships between extreme heat and mortality and should therefore not be presented as a prediction that exactly 451,000 people will die.
It is instead an assessment of potential excess mortality under the projected climate conditions.
The researchers say targeted preparation, including heat warnings, cooling centres and protections for outdoor workers, could reduce the human impact.
Africa Faces Multiple Risks
Africa is among the regions requiring close attention because El Niño can influence rainfall patterns across parts of the continent.
The effects vary considerably from one sub-region to another.
In some areas, below-normal rainfall can increase drought pressure.
In others, unusually heavy rainfall can increase the risk of flooding.
The WMO's forecast does not mean that every African country will experience drought or heat at the same time.
Instead, it provides a broad climate signal that national meteorological services can translate into more detailed country-level forecasts.
The African Sahel is of particular interest because the Climate Impact Lab's analysis identifies it as one of the areas where heat-related mortality could be substantial under the projected event.
The region's vulnerability is linked to exposure to heat, dependence on climate-sensitive livelihoods and limited access to cooling and other protective infrastructure in some communities.
For governments and humanitarian agencies, the value of an El Niño forecast lies partly in the time it provides to prepare.
Agriculture Under Pressure
Agriculture is one of the sectors most sensitive to El Niño.
Crops depend on temperature, rainfall, soil moisture and water availability.
A shift in the timing or quantity of rainfall can affect planting, germination, crop growth and harvests.
Drought can reduce yields and increase demand for irrigation.
Flooding can destroy fields, wash away soil and damage roads and storage facilities.
Heat can also reduce crop productivity and increase water requirements.
Because El Niño impacts different regions differently, the effects on global agriculture are likely to vary.
Some producing regions may benefit from favourable rainfall while others suffer losses.
The international consequences can emerge when several major producing areas experience adverse conditions at the same time.
That can tighten supplies of particular commodities and put upward pressure on prices.
The Associated Press reported that Southeast Asia is already seeing concerns around declining water levels, wildfire conditions, fisheries and agricultural production as the developing El Niño strengthens.
The region includes several important producers of rice, palm oil and other commodities.
Southeast Asia Watches the Rainfall Closely
Southeast Asia is among the areas where El Niño traditionally has a strong influence.
The developing event is already being watched for its potential effects on rainfall, agriculture, fisheries and water resources.
Indonesia and other countries in the region have experienced conditions that are drawing increased attention from authorities.
The Associated Press reported falling water levels, wildfire concerns and declining fish populations along parts of the Mekong system as regional impacts develop.
The importance of the region extends beyond its borders.
Southeast Asian countries are major suppliers of food and agricultural commodities to international markets.
Reduced output can therefore affect food prices in countries that are far away from the Pacific.
This is one reason El Niño is treated as a global economic issue rather than simply a meteorological event.
Possible Food-Price Effects
Food markets respond to expectations as well as actual harvests.
When traders anticipate lower production in major agricultural regions, commodity prices can move before the final harvest figures are known.
The magnitude of any increase depends on the crop, inventories, trade flows and the performance of other producing regions.
Goldman Sachs has estimated that a combination of weather disruptions could produce significant increases in global food prices, while the AP reported that reduced Southeast Asian production could have international effects.
Such estimates should be treated as scenarios rather than guaranteed outcomes.
Global food markets have multiple sources of resilience, including inventories, alternative suppliers and changes in consumption.
Nevertheless, the prospect of simultaneous climate stress in several agricultural regions creates an additional risk at a time when many countries are already dealing with elevated energy, fertilizer and transportation costs.
Fisheries Could Also Be Affected
El Niño's influence extends into the oceans.
Changes in ocean temperature and circulation can affect nutrient availability and marine ecosystems.
This is particularly important along the Pacific coast of South America, where nutrient-rich waters normally support highly productive fisheries.
A strong El Niño can weaken or disrupt those conditions.
Fisheries are also important in Southeast Asia and other regions where coastal communities depend on marine resources for food and income.
The AP has reported concerns about falling fish populations in parts of the Mekong region as the developing El Niño changes water and weather conditions.
The effect on fisheries can therefore become another pathway through which a climate event influences food security.
Flooding Remains a Major Threat
El Niño is commonly associated with drought in some areas, but it can increase rainfall and flooding elsewhere.
This is an important distinction because a strong El Niño does not mean the world becomes uniformly dry.
The WMO has explicitly warned of increased risks of floods as well as drought and extreme heat.
Heavy rainfall can overwhelm drainage systems, rivers and dams.
Urban areas are particularly vulnerable where rapid development has reduced natural drainage or where infrastructure has not kept pace with population growth.
Flooding can also affect roads, bridges, electricity networks, schools and healthcare facilities.
For agricultural communities, flood damage can occur just as rapidly as drought damage.
The timing of rainfall matters as much as total rainfall.
A season with adequate cumulative rainfall can still produce crop losses if rain arrives in destructive downpours rather than being distributed across the growing period.
Wildfire Risks
Hotter and drier conditions can also increase wildfire risk in susceptible areas.
The AP has reported wildfire concerns in Southeast Asia as the El Niño event develops.
Fire risk depends on several factors, including vegetation dryness, wind, humidity, land use and human activity.
El Niño can influence some of those conditions by changing rainfall and temperature.
Wildfires can damage forests, farms and infrastructure while producing smoke that affects air quality.
Smoke exposure can increase respiratory risks, particularly among children, older people and those with existing vulnerabilities.
This creates an additional health dimension to what initially appears to be a weather phenomenon.
Water Security
Water availability is another central concern.
Drought conditions can reduce reservoir levels, river flows and groundwater recharge.
Cities may face increased competition for water between households, agriculture and industry.
Hydropower production can also be affected where electricity systems depend heavily on reservoirs.
Conversely, excessive rainfall can overwhelm water systems and contaminate supplies.
The WMO's early-warning approach is therefore focused not just on weather forecasts but on translating climate information into decisions across sectors.
Water authorities can use seasonal forecasts to review reservoir operations, drought plans and flood preparedness before the most intense part of the event.
Health Consequences
Heat is one of the most direct health threats associated with the developing event.
Extreme heat can cause dehydration, heat exhaustion and heatstroke.
It can also increase stress on the cardiovascular and respiratory systems.
People working outdoors are especially exposed because they cannot always avoid the hottest periods of the day.
Older adults, young children and people without reliable access to cooling can also face greater risks.
The Climate Impact Lab's projected heat mortality estimate is intended to show the potential scale of the problem and the value of early intervention.
The researchers specifically point to measures such as heat warnings and cooling centres.
These interventions can be relatively straightforward compared with the cost of responding after a heat disaster has already developed.
Early Warning Becomes More Important
Meteorological forecasts are useful only when they lead to action.
The WMO says its network of meteorological and hydrological services is stepping up preparedness and early-warning efforts in response to the expected exceptional El Niño.
Early warnings can help authorities identify where particular hazards are likely.
For agriculture, this can mean adjusting planting schedules or selecting more suitable crops.
For cities, it can mean preparing emergency cooling facilities and reviewing flood drainage.
For health authorities, it can mean increasing public communication and monitoring heat-related illness.
For humanitarian agencies, it can mean pre-positioning supplies before roads become inaccessible.
For energy authorities, it can mean preparing for possible changes in hydropower production and electricity demand.
Forecast Uncertainty Still Matters
Despite the high confidence that El Niño will persist and strengthen, uncertainty remains about its exact peak and regional consequences.
Climate models are better at predicting large-scale seasonal patterns than specific local weather events months in advance.
The GFDL experimental forecast illustrates this.
Although all 30 ensemble members in its September forecast indicated a historically strong event, the range between individual simulations widened farther into the future.
The researchers also revised their expected peak slightly downward compared with the previous month's forecast.
That does not remove the possibility of a very strong event.
It demonstrates instead why forecasts must be updated continuously.
The strength, timing and interaction with other climate patterns will determine the eventual regional impacts.
A Positive Indian Ocean Dipole Adds Complexity
The Indian Ocean is also becoming an important part of the climate picture.
The WMO expects a positive phase of the Indian Ocean Dipole, or IOD, to develop alongside El Niño.
Its September-November seasonal mean is forecast at approximately +0.9°C.
The IOD describes differences in sea-surface temperatures between the western and eastern tropical Indian Ocean.
Its phases can influence rainfall across East Africa, South Asia, Australia and surrounding regions.
When it occurs alongside El Niño, the combined effects can differ from what either climate phenomenon would produce on its own.
That is why WMO forecasters caution that other ocean conditions may reinforce or modify the classic El Niño pattern.
Global Oceans Are Already Warm
The developing El Niño is also occurring against exceptionally warm global ocean conditions.
The WMO has repeatedly noted that background ocean warmth can influence the magnitude of climate impacts.
El Niño is therefore not occurring in isolation.
The climate system is responding to multiple interacting factors.
This makes direct comparisons with historical El Niño events difficult.
An event may resemble a previous El Niño in terms of Pacific sea-surface temperatures while producing somewhat different effects because the background state of the atmosphere and other oceans has changed.
Scientists consequently examine the whole climate system rather than relying on a single temperature measurement.
Why 2026 Is Receiving So Much Attention
Several factors explain the unusual level of attention surrounding this year's event.
First, the Pacific warming is already strong.
Second, forecasts indicate continued strengthening.
Third, the event is expected to persist through early 2027.
Fourth, other ocean conditions, including the positive Indian Ocean Dipole, are developing at the same time.
Fifth, the event is occurring in a world where global temperatures are already unusually high.
The combination creates the potential for overlapping hazards.
The WMO says the current El Niño could produce significant changes in rainfall and temperature patterns and increase risks of floods, drought and extreme heat through 2027.
Lessons From Previous El Niño Events
Previous strong El Niño episodes have demonstrated the broad reach of the phenomenon.
They have been associated with droughts in some regions, excessive rainfall in others, shifts in fisheries, agricultural losses and changes in disease risk.
But every El Niño is different.
The 1997-98 and 2015-16 events are often used as reference points because of their strength and extensive impacts.
The current event is being compared with those historical episodes because some forecasts suggest it could reach comparable intensity.
Such comparisons should not be interpreted as predictions that the same impacts will occur again.
The location and timing of weather anomalies depend on the precise atmospheric response.
Governments Have a Preparation Window
One of the most useful features of seasonal forecasting is that it gives decision-makers time.
If a government knows several months in advance that a region is at increased risk of drought, it can examine water reserves and agricultural support.
If flooding is more likely, emergency authorities can inspect drainage systems, identify vulnerable communities and prepare evacuation plans.
If extreme heat is expected, health agencies can establish warning systems and communicate protective measures.
The WMO describes climate information and early-warning services as tools for saving lives and livelihoods precisely because they allow decisions to be made before extreme events occur.
The current El Niño therefore represents not only a hazard but also a forecasting opportunity.
What It Could Mean for Global Trade
Climate shocks can affect international trade by altering agricultural output, energy demand and transportation.
A drought can reduce commodity exports.
A flood can damage ports, railways and roads.
Extreme heat can reduce labour productivity.
Wildfires can interrupt transport and damage infrastructure.
If multiple producing regions are affected simultaneously, countries may compete for alternative supplies.
That can raise prices and create additional pressure on import-dependent economies.
The consequences can be particularly serious for countries that already face high food and energy costs.
The AP has noted that Southeast Asia's importance in global food production means climate-related disruptions there can extend beyond the region.
Vulnerable Communities Face the Greatest Exposure
The effects of a strong El Niño are unlikely to be distributed evenly.
Communities with strong infrastructure, reliable electricity, effective emergency services and access to healthcare may be better positioned to manage extreme weather.
Poorer communities can face greater exposure and fewer resources for adaptation.
Farmers who depend entirely on rainfall are particularly vulnerable to drought.
People living in flood-prone settlements may have limited ability to relocate.
Outdoor workers can be exposed to dangerous heat for long periods.
This makes preparedness an issue of both climate science and public policy.
The Economic Cost Can Spread Beyond Disaster Zones
A climate event does not need to destroy infrastructure directly to create economic damage.
Crop losses can increase food prices.
Heat can reduce productivity.
Water shortages can restrict industrial activity.
Wildfires can raise insurance costs.
Floods can disrupt supply chains.
Fisheries losses can affect food processors and coastal communities.
These indirect effects can continue long after the weather event itself has ended.
The scale of the eventual economic impact will depend on the strength and geographic distribution of the event.
What Scientists Are Watching Now
Meteorologists are monitoring several indicators.
The most important include Pacific sea-surface temperatures, atmospheric pressure patterns, trade winds, ocean heat content and the evolution of the Niño indices.
They are also watching the Indian Ocean and Atlantic because conditions there can modify the El Niño response.
The WMO's September outlook indicates a further strengthening trajectory, while NOAA's September diagnostic confirms that the event is already strong and likely to intensify.
Forecast centres will continue updating their assessments as new observations become available.
The Road to the Peak
The current forecasts indicate that the event will intensify through the remainder of 2026.
The WMO expects peak intensity toward the end of the year, while its seasonal outlook places the strongest development around November-December.
The effects may continue into 2027 even after the Pacific temperatures begin to decline.
This is because the atmosphere and oceans do not instantly return to normal when the peak has passed.
The WMO expects the El Niño state to persist through February 2027 with nearly 100 per cent probability based on its latest forecast.
That gives governments several months of continued climate risk to manage.
The Importance of Local Forecasts
Global forecasts provide the broad picture.
National meteorological services provide the information people actually use.
A farmer needs to know whether rainfall is likely to arrive late in a particular state.
A city authority needs to know whether flooding is more likely in a particular drainage basin.
A health agency needs information about expected heat in specific communities.
Global climate agencies therefore work through national meteorological and hydrological services to translate large-scale signals into local warnings.
The WMO has emphasised this coordination as part of its response to the developing event.
Nigeria and West Africa
For West Africa, the significance of El Niño lies primarily in its potential to alter seasonal rainfall and temperature patterns, although the precise effects can vary substantially by location.
The Sahel is among the regions highlighted in the Climate Impact Lab's heat-mortality analysis.
For countries across the region, agricultural planning, water management and heat preparedness will remain important as the event develops.
National weather services will need to continue updating seasonal and shorter-range forecasts rather than relying on a single global projection.
For farmers, climate information can help guide decisions on planting dates, crop choices and water use.
For cities, heat and flood planning can help reduce risks to residents.
A Climate Event With Global Consequences
The developing El Niño is a reminder that conditions in one part of the planet can influence weather, food production, health and economic activity elsewhere.
The warming of the tropical Pacific is not simply a local ocean event.
Through atmospheric circulation, it can influence rainfall and temperature patterns across continents.
The current forecast is particularly significant because the event is strengthening rapidly and is expected to reach very strong intensity.
WMO forecasts place the probability of persistence through early 2027 at nearly 100 per cent, while NOAA gives a greater than 90 per cent chance of a very strong event during the coming Northern Hemisphere autumn and winter.
The precise regional consequences will continue to evolve.
Preparation Is the Immediate Priority
The strongest message emerging from the scientific assessments is not that a particular disaster is guaranteed.
It is that governments and communities have enough information to prepare for elevated risks.
Heat warnings can protect vulnerable populations.
Flood planning can reduce casualties.
Agricultural advice can help farmers adjust to changing rainfall.
Water management can reduce the consequences of drought.
Early humanitarian action can protect food security.
The Climate Impact Lab's heat-mortality analysis similarly emphasises that targeted interventions can save lives during extreme heat.
Preparation does not eliminate climate risk, but it can reduce exposure.
A Powerful El Niño Enters Its Critical Phase
The world is now moving toward the most important phase of the 2026 El Niño event.
Pacific waters are exceptionally warm.
Atmospheric indicators confirm that the phenomenon is established.
Forecast models show continued strengthening.
The WMO expects a very strong event that could peak toward the end of 2026 and persist into early 2027.
NOAA's assessment independently points to a greater than 90 per cent probability of a very strong event, while an experimental NOAA model suggests the event could compete with or exceed the strongest episodes in the historical record.
The consequences will not be identical everywhere.
Some communities will face heat and drought.
Others may face heavy rain and flooding.
Agricultural and fishing communities may experience disruptions, while international markets could feel the effects through food supplies and prices.
The potential human impact is also drawing attention, with a Climate Impact Lab analysis projecting hundreds of thousands of heat-related deaths if the current climate conditions develop as modelled. That estimate remains a projection and will be revised as observations accumulate.
For governments, the coming months are therefore a period for preparedness.
The scientific community will continue monitoring the Pacific and updating forecasts.
National weather agencies will refine regional predictions.
Humanitarian organisations will assess vulnerable populations.
Farmers and water managers will adjust to emerging information.
And health authorities will have to prepare for the possibility of prolonged extreme heat in vulnerable areas.
El Niño is a natural climate phenomenon, but its effects occur in a world where populations, cities, food systems and infrastructure are increasingly exposed to climate extremes.
The developing 2026 event will test how effectively governments and communities can turn increasingly sophisticated climate forecasts into practical early action.
The central uncertainty is no longer whether El Niño has developed.
It has.
The key questions now are how strong it will become, where its most severe effects will occur and how successfully countries can prepare before the strongest impacts arrive.
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