El Niño’s economic impact on global supply chains

• El Niño begins with warmer Pacific waters, but its economic consequences can extend across global supply chains.
• Soft commodities, metals, power generation and transport may all be affected, with significant regional differences.
• Upstream and downstream producers face different combinations of price, volume and margin exposure.

El Niño shifts warm Pacific waters eastwards, altering rainfall patterns across several regions. It typically brings drier conditions to parts of Southeast Asia, Australia and southern Africa, and wetter weather to parts of South America and the southern United States. The effects vary with the event’s strength, duration and timing, while Europe has no consistently reliable direct signal.

Agriculture is one of the clearest transmission channels. The resulting commodity effect is therefore unlikely to be uniform. Global trade flows matter as much as local harvests. Better output in Argentina or the United States could compensate for losses in another region, while crops concentrated in only a few exporting countries may be more sensitive. Inventories, export restrictions and the timing of weather during planting or flowering can also be decisive.

Even when adverse weather reduces production, the impact on soft commodities’ exposed corporates usually arrives with a delay, for three main reasons:

1. Agricultural inventories need to decline.
2. Procurement contracts need to be reset.
3. Existing hedges must expire.

As a result, large food manufacturers often secure raw materials months in advance, meaning that a late-2026 weather shock may become more visible in margins during 2027 rather than immediately.

The effect also varies considerably by business model. A branded food company purchasing cocoa faces a different exposure from a processor operating under cost-plus contracts, through which rising raw-material costs can be passed through.

Palm oil producers illustrate another important tension. Drought can reduce plantation yields and production volumes, but lower regional supply may support selling prices. For producers, the net earnings effect would depend on whether stronger realized prices compensate for weaker output. The same dynamic applies to mining companies, whose local operations may be disrupted even as tighter supply supports commodity prices.

El Niño’s impacts extend beyond soft commodities, with notable examples being electricity generation, mining, and transport.

Hydropower-dependent regions are particularly sensitive because lower reservoir levels reduce cheap generation and may force corporates to purchase more expensive replacement power. This matters especially for smelters, which need a continuous, large-scale power supply. As some of China’s smelting capacity has moved to hydro-rich regions, its exposure to drought has increased.

Copper presents a more mixed picture. Heavy rainfall and flooding can disrupt mining operations in parts of Peru and northern Chile, reducing output and supporting prices. The impact on earnings, however, depends on each miner’s geographic exposure and the severity of the disruption.

Finally, transport links form another potential transmission channel, as low water levels can restrict vessel capacity through for instance the Panama Canal, similarly to what happened during summer 2026 to the Rhine river in Germany. Such constraints can raise freight costs and lengthen delivery times, although the financial impact depends on the duration of the disruption and the availability of alternative routes.

El Niño will not produce a single, predictable outcome. Its impact depends on where rain falls, when crops are hit and how quickly shortages work through inventories and contracts. Higher commodity prices may help some producers while lost output hurts others.