The hottest June ever recorded in western Europe has wiped out about 9 million tonnes of grain across the EU and the UK. That lost grain is worth an estimated €2 billion (£1.7 billion), and it adds up to what trade group Coceral says will be the smallest grain harvest in the region since 2018 The Guardian.

Coceral, which represents businesses that trade in cereals (grains like wheat, maize, and barley) and oilseeds (crops like sunflower and soya), lowered its 2026 grain forecast to 286.6 million tonnes in its July bulletin, down from 295.5 million tonnes in June. Total grain production for 2026 is now expected to drop by 23.4 million tonnes compared to 2025 World Grain.

The 9-million-tonne loss is bigger than the entire grain harvest of Austria, Ireland, and the Netherlands combined. The heat hit at the worst possible time for the plants: maize was trying to pollinate (the step where pollen transfers so kernels can form), and wheat was in its grain-fill stage, when the seed heads need steady water to grow full. Once these stages are disrupted, the plant cannot recover. Coceral linked the losses directly to the record June temperatures The Guardian.

France took the hardest hit, with about 3.4 million tonnes of maize lost and costs expected to reach €891 million. Hungary is projected to lose 2.4 million tonnes and Spain 1.4 million tonnes. The €2 billion figure, calculated by the Energy and Climate Intelligence Unit (ECIU) thinktank using current prices, covers only grain. It does not include other heatwave damage like lost vegetables or struggling livestock The Guardian.

Tom Lancaster, the ECIU's land, food and farming analyst, said the heatwave would cut farmer income and weaken European food security. French farmer Benoît Merlo, from the Auvergne-Rhône-Alpes region, reported temperatures above 38°C for weeks on end and expects to lose at least 50% to 70% of certain crops like soya The Guardian.

Helen Plant, lead analyst at the UK Agriculture and Horticulture Development Board (AHDB), provides market context for the supply picture. Paul Tompkins, deputy president of the UK National Farmers' Union, said the 2026 harvest could be "another difficult and expensive one" after extreme weather also hit in 2024 and 2025. That makes this the third year in a row of weather-driven damage to European farms, not a one-off event The Guardian.

The lost crops mean Europe will likely need to buy more grain from other countries, which pushes global food prices higher. Europe normally sells more grain to the rest of the world than it buys. When that flips, it redirects trade routes, strains shipping and logistics, and sends price increases through animal feed, livestock, and eventually the food people buy in shops.

The €2 billion figure probably understates the real damage. Vegetable crops and livestock losses are not included in that estimate. They are harder to measure region by region, but they can be significant during long heatwaves, especially where farms lack enough irrigation or where heat stress reduces animals' ability to reproduce.

What does this mean for policy? Three years in a row of weather-damaged harvests will put pressure on the EU's farming support system, known as the Common Agricultural Policy, and on national emergency response tools. Crop insurance coverage varies widely across EU countries, and the repeated nature of these shocks raises questions about whether current plans to adapt to climate change are moving fast enough. For grain markets, Coceral's next forecast in September 2026 will show whether the July numbers held up or got worse as the heat continued Coceral.

The bigger picture is that three straight years of extreme weather damage to European farms is no longer something policymakers and markets can call unusual. The 2026 heatwave hit at the exact moments crops could not afford stress, and once those growth windows are missed, there is no second chance. What is lost in June does not come back in July.