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Possible impacts of El Niño 2026 in Latin America: country by country (updated)

Mateus Lima
Mateus Lima

CEO

7 min read
Possible impacts of El Niño 2026 in Latin America: country by country (updated)

El Niño 2026 is already classified as a strong category, with the Niño 3.4 region at +1.8°C, and the CPC/NOAA points to over 90% chance of a very strong event in fall and winter 2026-2027. In Brazil, the risk concentrates on above-average rainfall in the South and navigation restrictions in the Amazon. In Chile, the pattern splits the country between drought in the copper-producing north and intense rainfall in the center-south. In Panama, the Canal has already reduced daily transits and draft due to lack of water in the lakes.

  • El Niño 2026 is in strong category: +1.8°C in the Niño 3.4 region, with over 90% chance of very strong intensity by the end of 2026, according to the CPC/NOAA (Sep/2026).
  • In Brazil, the Madeira River halted navigation in Porto Velho after hitting the critical level of 2 meters, and up to 5 million tons of soybeans and corn may be affected on the Tapajós in the second half of the year (CNI, AgFeed, Aug/2026).
  • In Chile, an atmospheric river is already reaching Coquimbo, Valparaíso, the Metropolitan Region, O'Higgins, Maule, Ñuble and Biobío, and copper mining in the north remains exposed to water deficit (La Tercera, Veja, Aug/2026).
  • In Panama, the Canal is cutting from 36 to 32 vessels per day starting September 15, 2026, in addition to the Neopanamax draft already limited to 49.5 feet since July (Folha de S.Paulo, ACP, 2026).
  • i4sea already measures the return of early warning: US$ 305 thousand/year in benefit at Puerto Mejillones and a drop from 7 to 3 days in ship waiting time at Santos Brasil (i4sea study; G1, 2026).

When a client asks me whether the 2026 El Niño "will be strong," the correct answer is not yes or no. It's: it already is. The Niño 3.4 region reached +1.8°C and NOAA's Climate Prediction Center gives over 90% chance of the phenomenon consolidating as very strong in the northern hemisphere's fall and winter, between September 2026 and February 2027. Those who operate ports, mines, railways or power plants no longer ask whether the phenomenon is coming. They ask where and how much.

El Niño is the anomalous warming of surface waters in the Equatorial Pacific Ocean, which redistributes rainfall, wind and temperature patterns on a continental scale. The effect is not uniform: the same phenomenon that brings above-average rainfall to Southern Brazil dries out northern Chile and reduces the level of the lakes that supply the Panama Canal. Each country receives a different combination of drought, extreme rain and heat, and each critical asset feels this at a different point in the calendar.

In this text, I focus on three countries with the largest volume of fresh data and exposed critical operations: Brazil, Chile and Panama. The other countries in the region appear in two summarized blocks, because the risk pattern repeats within each block. The objective is the same in all cases: separate what is generic alert from what is measurable management variable.

Impacts of El Niño 2026 in Brazil: rain in the South and navigation in the Amazon

In Brazil, El Niño 2026 acts on two simultaneous fronts: above-average rainfall in the Southern Region, which pressures port and grain logistics, and falling water levels in Amazon rivers, which has already interrupted navigation in critical stretches. The combination with the road freight floor amplifies the financial risk for agribusiness through 2027.

The 2nd bulletin of the El Niño Panel 2026-2027, from INPE and INMET (August 19, 2026), projects above-average rainfall in areas of the Southern Region in the August-September-October quarter. This is the same pattern that, in previous cycles, raised flood risk on access highways to Paranaguá and Rio Grande and affected the flow of grains and fertilizers through Southern ports.

In the Amazon, the alert has already become fact. Navigation on the Madeira River was interrupted in Porto Velho after reaching the critical level of 2 meters (Portal da Indústria and CNI, August 24, 2026). On the Tapajós, the estimate is that up to 5 million tons of soybeans and corn will be exposed to navigation restrictions in the second half of the year (AgFeed, August 19, 2026). For those who depend on waterways, this means contracts at risk and deadlines that the official gauge did not predict.

The cost shows up in the freight bill. Agência Infra (August 6, 2026) projects that the combination of El Niño with the road freight floor could generate a financial impact of millions in agribusiness, with effects extending through 2027. When the river falls short, trucks take over, and alternative freight costs more.

It was exactly this type of decision, whether to ship or wait, that Santos Brasil began anticipating with data calibrated for the estuary channel. "Before, the ship would arrive, the team would be ready, but it couldn't enter due to bad weather," reports Evelyn Lima, Operational Planning Director at Santos Brasil. With forecasting done for the channel, not for the city, average ship waiting time dropped from 7 to 3 days (G1, 02/18/2026). The same reasoning applies to those who currently depend on the level of an Amazon river: the hydrological station gauge confirms the closure, but doesn't warn in time to reorganize cargo.

Impacts of El Niño 2026 in Chile: drought in mining and rain in the center-south

Chile concentrates the two opposite faces of El Niño at the same time: water deficit in the north, where copper mining is located, and intense rainfall in the center-south, where the country's main ports are located. NOAA already warns that the phenomenon could reach historic intensity in 2026-2027, which raises exposure on both sides.

In the north, in the Antofagasta and Atacama regions, the trend is persistent water deficit. Copper mining consumes water on an industrial scale, and a prolonged dry period pressures desalination costs and the logistics of transporting ore to shipping ports. Antofagasta PLC is among the mining companies most exposed to the phenomenon, according to Bloomberg Línea analysis.

In the center-south, the pattern reverses. An atmospheric river is already advancing through the Pacific and hitting with greater intensity the regions of Coquimbo, Valparaíso, the Santiago Metropolitan Region, O'Higgins, Maule, Ñuble and Biobío, according to a report by Veja magazine. Experts consulted by the newspaper La Tercera (August 18, 2026) already predict more rain in Chile throughout the event. Intense rainfall in these regions paralyzes roads, interrupts cargo flow to the ports of Valparaíso and San Antonio and increases the risk of landslides on access roads to hillside operations.

It is this second risk, that of landslide associated with extreme rainfall, that i4sea monitors with slope stability models combined with hyperlocal precipitation forecasting. And it is in this context that i4sea's two Chilean cases gain practical relevance. At Puerto Mejillones, anticipating port closures and openings generated US$ 305 thousand per year in operational benefit, of which US$ 54 thousand per year in avoided demurrage (i4sea study). At Capstone Copper, at Puerto Barquito, the model came to capture 20 of 21 real closure events, a 95% sensitivity (i4sea study).

The technical data matters because it shows what a Chilean port or mine manager needs to know before deciding: it's not the historical monthly average that closes the operation, it's the hyperlocal condition on that day. The same probability-of-closure reasoning applies to any port that depends on human decision-making under limit conditions.

Impacts of El Niño 2026 in Panama: fewer ships per day at the Canal

In Panama, El Niño 2026 has already reduced the Canal's operational capacity. The Panama Canal Authority is cutting the number of daily transits from 36 to 32 vessels starting September 15, 2026, in response to falling water levels in the lakes that supply the locks.

The transit cut is the second measure of the year. Since July 3, 2026, the maximum draft for Neopanamax ships has already been limited to 49.5 feet, or 15.09 meters, a preventive restriction to protect the reserves of Lake Gatún and Lake Alhajuela. The new flow restrictions take effect from September 3, 2026, according to the newspaper Público, and the cut in the number of ships per day was confirmed by Folha de S.Paulo on September 4, 2026.

The pattern recalls 2023-2024, when the drought associated with the previous El Niño reduced daily transits from 35-36 to 22 ships and the Neopanamax draft from 50 to 44 feet. The difference this time is the context: global freight is already pressured by disruptions in the Middle East and the Strait of Hormuz, which makes any additional restriction in Panama weigh more heavily on the global logistics chain.

For shipowners and logistics operators, the practical question is no longer whether the Canal will restrict. It's how much waiting time this restriction imposes on the route and when it's worth redesigning the journey. Understanding the decision window before the restriction becomes an accomplished fact is what separates avoided cost from realized loss.

Andean Region: Peru, Ecuador, Bolivia and Colombia under risk of drought and extreme rainfall

In the Andean Region, El Niño 2026 combines extreme rainfall on the coast of Peru and Ecuador with energy risk due to drought in Colombia's reservoirs. The region's combined GDP could decline by 0.6 to 1.7 percentage points in a strong El Niño scenario, with infrastructure and logistics feeling the impact first.

In Peru and Ecuador, a Coastal El Niño event has been punishing the region since February, with over 106 deaths recorded. The ports of Callao and Guayaquil face risk of total shutdown in intense rainfall events. The Peruvian fishing sector is the most affected: Produce projects a 23% drop in fishing in 2026, the anchovy fishing ban has been extended, fishmeal exports could fall up to 70% and over 250 thousand jobs linked to fishing are at risk. The ENFEN committee maintains alert status and does not rule out impact through 2027.

In Colombia, exposure is energy-related. Hydroelectric plants account for 65% to 70% of the country's electricity matrix, concentrated in regions where 90% of the population lives. Reservoirs were already operating below 60% in April 2026, and Ideam estimates 90% probability that El Niño will consolidate by September. The scenario repeats 2015-2016, when drought cut hydroelectric generation and spiked energy prices in the spot market. The drought also reduces the draft of the Magdalena River, which compromises the flow of coal and coffee through the ports of Cartagena and Santa Marta.

Mexico, Central America and the Caribbean: chronic water stress worsens

In the Mexico, Central America and Caribbean block, El Niño 2026 deepens a water stress that was already structural. The risk concentrates on extreme heat, falling water availability for agriculture and mining, and pressure on ports and power generation.

In Mexico, the National Meteorological Service projects the most intense heat wave ("canícula") ever recorded, with water stress at critical level. The water deficit affects strategic crops such as corn, beans and wheat, in addition to pressuring the Pacific ports of Manzanillo and Lázaro Cárdenas, which handle a significant portion of trade with Asia. Mexican thermoelectric and hydroelectric generation suffers double pressure: less river flow and more cooling demand during heat waves.

In Central America, prolonged drought in countries such as Guatemala, Honduras and Nicaragua compromises water supply for ore processing, which raises operating costs for mining companies in the region. The Caribbean and Central America are among the areas with the highest probability of water deficit in strong El Niño events, according to the WRI.

Frequently asked questions about El Niño 2026 in Latin America

What is the difference between strong El Niño and Super El Niño?

Strong El Niño is the current classification, with the Niño 3.4 region at +1.8°C and the CPC/NOAA pointing to over 90% chance of a very strong event between fall and winter 2026-2027. Super El Niño is the level above +2.0°C, historically rare, monitored but not yet confirmed in this cycle.

Does El Niño 2026 affect all of Brazil in the same way?

No. The observed pattern projects above-average rainfall in areas of the Southern Region, with flood risk in grain logistics, while Amazon rivers, such as the Madeira and Tapajós, already face navigation restrictions due to falling water levels.

Why is the Panama Canal reducing the number of ships per day?

Because the water level of Lake Gatún and Lake Alhajuela, which supply the locks, falls during strong El Niño events. The Canal Authority has already limited the Neopanamax draft since July 2026 and is reducing the number of daily transits from 36 to 32 starting September 15, 2026.

How does i4sea measure the benefit of anticipating El Niño?

With auditable case studies on real assets. At Puerto Mejillones, the measured operational benefit was US$ 305 thousand per year, including US$ 54 thousand per year in avoided demurrage. At Santos Brasil, average ship waiting time dropped from 7 to 3 days.

What to do now with El Niño 2026 underway

El Niño 2026 is no longer a forecast, it's an observed condition. The question remaining for those who operate ports, mines, railways or power plants in Latin America is not whether the phenomenon will affect operations. It's whether the risk will be measured with enough lead time to decide, or discovered too late to avoid the cost.

i4sea monitors over 100 critical assets in Latin America and Europe, with 1 to 3 km resolution and coverage of 18 hydrometeorological hazards. You don't control El Niño, but you can manage the risks it brings to your operation. Try i4sea's AI Climate Agent and see the probability of restriction for your asset before it becomes an accomplished fact.

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References

INMET, bulletin, September 2026: Niño 3.4 region at +1.8°C.
CPC/NOAA, ENSO Discussion, September 2026: over 90% chance of very strong event in fall-winter 2026-2027.
INPE/INMET, El Niño Panel 2026-2027, 2nd bulletin, August 19, 2026: above-average rainfall in the Southern Region.
Portal da Indústria/CNI, August 24, 2026: navigation interrupted on the Madeira River in Porto Velho.
AgFeed, August 19, 2026: up to 5 million tons of soybeans and corn at risk on the Tapajós River.
Agência Infra, August 6, 2026: financial impact of millions in agribusiness with El Niño and freight floor.
G1, February 18, 2026: Santos Brasil, testimony from Evelyn Lima, ship waiting time from 7 to 3 days.
La Tercera, August 18, 2026: NOAA warns about historic intensity of El Niño in Chile.
Veja magazine, 2026: atmospheric river and most affected Chilean regions.
Folha de S.Paulo, September 4, 2026: Panama Canal reduces daily transits from 36 to 32.
Público, August 21, 2026: new flow restrictions at the Panama Canal starting September 3.
Panama Canal Authority (ACP), 2026: Neopanamax draft limited to 49.5 feet since July 3.
Peru's Ministry of Production (Produce) and ENFEN, 2026: 23% drop in fishing, fishmeal exports and jobs at risk.
Ideam, 2026: 90% probability of El Niño consolidation in Colombia by September.
National Meteorological Service (SMN), Mexico, 2026: most intense heat wave ever recorded.
World Resources Institute (WRI): probability of water deficit in the Caribbean and Central America in strong El Niño events.
i4sea study: Puerto Mejillones, US$ 305 thousand/year in operational benefit, including US$ 54 thousand/year in avoided demurrage.
i4sea study: Capstone Copper / Puerto Barquito, 20 of 21 closure events captured, 95% sensitivity.

 

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