El Niño sends its invoices by river, field and claim form

The Copernicus Climate Change Service says September 2026 was the second-warmest September on record globally, at 1.63°C above the pre-industrial level and the second month in a row above 1.5°C¹. The Niño 3.4 region of the Pacific, the patch of ocean used to track El Niño, reached an all-time monthly high of 29.70°C, above the peaks of the very strong events of 1982/83, 1997/98 and 2015/16¹.

In Europe the signal was dryness. It was the third-warmest September on record for the continent, and parts of the Rhine, Danube, Vistula and Garonne-Dordogne saw record-low September river flows, disrupting navigation, water supply and agriculture¹. A river is a supply chain with a water level. Weather also set this week’s power prices: in the week of 5 October more wind pulled weekly electricity prices down in most European markets, while TTF gas futures rose on low storage, falling temperatures and the strait, settling at €84.35/MWh on 12 October, the highest since December 2022².

The same El Niño can be too dry and too wet at once. India’s monsoon fell short: Maharashtra has declared drought in 265 of its 358 talukas, Karnataka has notified 217 of 240, and Andhra Pradesh 388 of 688 mandals³. In Canada the problem was rain. By 21 September Saskatchewan’s harvest was 41% done against a five-year average of 82%, after more than three times normal precipitation in its main growing areas, and inspectors are finding sprouted wheat⁴.

Insurance is how weather becomes a price, and it is slow on purpose. The head of Agriculture Insurance Company of India said estimating claims now is premature, because yields are still being measured³. That is the constructive part: the bill is large, but it is also legible, and it arrives on a schedule. For households, the link runs through food, heating and insurance premiums over months, not days. That is a description, not advice.