El Niño's Double Blow to Peru: Southern Drought and Coastal Floods Put 7.8 Million Farm Hectares at Risk

Why Peru's Agriculture Is Facing a Dual Climate Shock Until March 2027

Peru is heading into the 2026-2027 agricultural campaign with two opposing El Niño threats: drought in the central and southern highlands, and intense rains, mudslides known as huaicos, and flooding in northern and some central regions. Cenepred, the national disaster risk agency, estimates that the combined scenarios could affect 7.8 million hectares of agricultural land through March 2027. By comparison, the latest national planting survey for the 23 main crops covers just over 2 million hectares.

The drought scenario alone puts roughly 1.4 million hectares of crops and 12.3 million head of cattle, sheep and alpacas at risk across 13 central and southern regions. Separately, the intense-rain scenario puts 6.3 million hectares of agricultural land at high or very high risk from huaicos and flooding, with Piura facing the largest flood exposure and the highest huaico risk.

The effects are already visible in economic and agronomic data. According to INEI, the agricultural sector contracted 0.66% from January to May 2026 compared with the same period in 2025. Economy Minister Elmer Cuba said the economy could be growing around 4.5% this year without the hit to agriculture and fishing. Coastal crops such as mandarins and plums are showing lower flowering and quality problems, and central coast maize yields have fallen from a typical ten tonnes per hectare to about two tonnes in current conditions.

What the 7.8-Million-Hectare Exposure Means for Farms, Exports and GDP

El Niño Is Already Dragging Down the National Growth Story

The GDP arithmetic is unusually concrete. Minister Cuba's 4.5% counterfactual and the 0.66% agro contraction show that climate risk has moved from a future concern to a current drag. The first year-on-year fall came in March, when El Niño Costero arrived, which suggests the pattern is directly linked to the anomaly rather than a longer structural decline.

Two Different Emergencies Are Competing for Government Attention

The risk maps do not describe one uniform problem. The drought study identifies 76 districts at very high risk and 614 at high risk in southern and central regions, with 204,245 hectares at very high risk and 1,287,574 hectares at high risk. At the same time, the flood and huaico scenario is concentrated in Piura, San Martín, Junín, Amazonas, Ancash and La Libertad. A response designed for northern flooding will not help southern producers facing delayed rainfed planting for potato, quinoa and fava beans.

Coastal Export Crops Face a Quality Problem, Not Just a Volume Problem

Senamhi agrometeorology specialist Stephany Tisnado said warm conditions are reducing flowering and affecting color, size and quality in mandarins and plums, while heavier September and October rain could encourage pests and disease. Agroclimatology expert Ulises Osorio added that the stress extends to rice, maize, cassava, blueberries and sugarcane. The maize yield collapse from ten to two tonnes per hectare is a concrete warning for buyers and exporters expecting normal volumes.

The Southern Highlands' Herd Flock Is Part of the Same Exposure

The drought scenario also covers 3.6 million hectares of pasture and more than 2.8 million cattle, sheep and alpacas in the high-risk zones alone, with Puno, Cusco, Arequipa and Ayacucho prominent. If pasture deteriorates before the 2027 dry season, meat, dairy and alpaca-fiber supply chains will feel the effect well beyond crop harvests.

Practical Responses for Farmers, Exporters and Public Planners Before the Next Harvest

• Producers in the 76 very-high-risk drought districts should use Senamhi's short-term rainfall forecasts to decide whether to delay rainfed potato, quinoa and fava bean planting; the agency says the southern highland deficit is tied to El Niño Global and can push back the start of the campaign.
• Coastal fruit growers and exporters should plan for lower flowering and quality downgrades in mandarins, plums, blueberries and sugarcane, and build the expected September-October pest and disease pressure into harvest and packing plans.
• Maize, rice and cassava producers in central coastal zones should not base budgets on normal yields; the current ten-to-two-tonne-per-hectare maize gap means procurement contracts and input orders need an explicit stress scenario.
• Input suppliers and agronomists can expect demand for third-generation biostimulation products that help crops tolerate abiotic stress, because the recommended response to this season's heat and wind is stress-management treatment rather than more fertilizer alone.
• Public planners and agricultural lenders need separate response tracks: flood and huaico relief for Piura, San Martín and nearby regions, and irrigation or water-storage support for Apurímac, Arequipa, Ayacucho, Cusco, Huancavelica, Moquegua, Puno and Tacna before March 2027.