Europe’s Unprecedented Drought Is Drying Its Rivers, Ruining Harvests and Shutting Down Power Stations

The drought spreading across Europe is no longer merely an agricultural or environmental emergency. Rivers that carry industry, cool power stations and sustain harvests are failing in several places at once, exposing how much of the continent’s economy depends on water arriving in the right place, at the right temperature and at the right time.

On the Rhine, the ships are still moving. That is what makes the crisis easy to miss. From the banks, Europe’s most important commercial river continues to look like a working artery: barges pass beneath bridges, cargo reaches the docks and the cranes at Rotterdam keep turning. But many vessels are travelling almost empty.

The river has become too shallow for a fully laden barge to pass safely. Ships carrying petroleum, chemicals and industrial materials are reportedly being loaded to only about 35 per cent of their normal capacity. To move the same quantity of cargo, operators must find more vessels, more crews and more fuel. Even then, some goods cannot be carried.

At Rotterdam, Europe’s largest port, the workaround has required roughly 115 additional barges a week. It is an expensive exercise in preserving the appearance of continuity. The cargo still moves, but the physical productivity of the system has collapsed.

Near Kaub in western Germany, the Rhine passes through a narrow stretch where water depth determines how much cargo can travel into the industrial interior. This summer, the river fell to extraordinary lows. Every lost centimetre required freight operators to remove more cargo from their vessels. Factories farther upriver could remain open, but the raw materials on which they depended arrived in smaller quantities and at a higher cost.

This is the first lesson of Europe’s drought. Water depth has become an economic variable.

For much of the industrial era, Europe could treat its rivers as permanent infrastructure. The Rhine carried the chemical, steel and engineering industries of Germany and its neighbours. The Danube moved grain and supplied cooling water to power stations. The Po irrigated the rice fields and farms of northern Italy. Reservoirs and aquifers sustained cities through the summer.

The system was designed around an assumption of continuity: the water might rise or fall, but the rivers would continue to perform all the tasks assigned to them.

In the summer of 2026, that assumption has begun to fail.

Western Europe has endured its hottest combined June and July since comparable records began in 1979. June was the region’s hottest on record and July its second hottest. Dry conditions that had developed during May intensified beneath persistent areas of high pressure, drawing moisture from vegetation and soil. As the ground dried, it lost part of its capacity to cool the air through evaporation, allowing temperatures to rise further.

By late July, the European Drought Observatory estimated⁠ that half of the territory of the European Union and Britain was under some degree of drought. Nine per cent was at alert level, meaning that low rainfall and depleted soil moisture had begun to cause visible damage to vegetation.

The speed of the change has been almost as disturbing as its extent. Heavy winter rainfall once offered reasonable protection against a dry summer. Full reservoirs and saturated soils in spring gave farms, rivers and water companies a reserve on which they could draw. This year, weeks of heat and negligible rainfall consumed that protection with remarkable speed.

England illustrates the change. Almost three-quarters of the country had entered drought by August 10. In late July, 78 per cent of monitored rivers were running below normal levels or worse. By August 11, reservoir storage had fallen to 65.9 per cent⁠, nearly 14 percentage points below the seasonal average.

The effects were visible in the bleached grass of Blackheath and in the cracked bed of a pond in Brighton. At Mottisfont in Hampshire, the dry weather revealed the buried foundations of a medieval monastery, their outlines emerging through differences in the dying grass. Elsewhere, the drought was uncovering less romantic things: abandoned boats, unexploded shells and stretches of industrial riverbed that had not seen daylight in living memory.

These images gave the drought an archaeological quality, as though Europe’s rivers were surrendering their past. Their economic significance lay in the present.

The Rhine is responsible for only part of German freight movement, but it carries materials for industries that cannot easily replace it. A railway wagon is not a barge, and a motorway cannot instantly absorb the volume displaced from a major river. Rail networks have limited spare capacity. Road transport requires many more vehicles, drivers and litres of fuel. Certain bulk materials become uneconomic to move by either.

During the drought of 2018, disruption on the Rhine was associated with a reduction of roughly 0.4 per cent in German economic output. Research by the Kiel Institute has found that a full month of low water can reduce inland water transport by about a quarter and industrial production by approximately 1 per cent.

The danger this year is not simply that the water has fallen farther. It has fallen earlier. If the river remains impaired through the end of summer, shortages can move through inventories and production schedules long after the lowest water has passed.

The Danube presents another version of the same dependency. In Romania, falling water levels deprived the Cernavodă nuclear station of the flow required for cooling. Authorities dredged the riverbed, used controlled explosions and sank rock-filled barges in an attempt to redirect water towards the plant. The intervention briefly raised the water near the remaining reactor by only a few centimetres. Both reactors were eventually taken offline.

The plant normally provides about a fifth of Romania’s electricity. Its loss forced the country to seek alternative generation and imports while asking consumers and businesses to conserve power. In Hungary, the Paks nuclear station also reduced output as the Danube receded.

Nuclear power is often discussed as insulation against disruptions in fossil-fuel supplies. Yet a reactor remains part of the landscape in which it is built. It needs water in sufficient volume and, during heatwaves, at a sufficiently low temperature to absorb and discharge heat without breaching environmental or safety limits.

Hydroelectric generation is still more directly exposed. When river flows decline, the same weather that increases demand for air conditioning can reduce the supply of electricity available to meet it.

Europe is therefore attempting to electrify transport, heating and industry while discovering that portions of its electricity system are themselves vulnerable to hydrological failure.

On the continent’s farms, the losses begin earlier and travel more slowly.

Around Vercelli in northern Italy, water ordinarily moves through a geometric landscape of rice paddies. This summer, it did not reach every field. Farmers were forced to decide which crops might still be saved and which should be abandoned. Some paddies were left brown and lifeless, the rice burnt by weeks of heat.

This is not simply a matter of a smaller harvest. Farmers must still pay for seed, machinery, labour and much of the energy used before the crop fails. Repeated losses weaken their capacity to plant again. In parts of the Po Valley, farmers are considering replacing rice with less water-intensive crops or leaving land unused rather than gambling on another season.

Across Bavaria, grain was harvested early after weeks without substantial rain. Maize plants failed to develop. In Britain, cereal yields have suffered through one of the driest and hottest growing periods in the modern record. On the lower Danube, the drought has struck both the harvest and the means of transporting it. The cost of carrying Romanian grain by barge to Constanța reportedly rose from about €11 a tonne before the harvest to between €18 and €20.

Three costs are accumulating: Europe is producing less food, spending more to preserve what survives and paying more to move it.

The consequences will not end with the 2026 harvest. Farmers must soon decide what they can afford to plant for next year. Fertiliser production and trade have already been disturbed by the Iran war and the resulting pressure on energy and shipping routes. If fertiliser remains scarce or expensive during the autumn planting season, the effects of drought and war will reinforce one another.

A poor harvest this year, more expensive fertiliser, weakened farm finances and inadequate winter rainfall would form a chain leading into 2027. Food inflation often appears months after the field has dried.

That delayed transmission matters to the European Central Bank. Drought is a supply shock: it reduces the availability of goods and energy while raising their cost. Higher interest rates can suppress demand, but they cannot deepen the Rhine, restore a rice paddy or cool the Danube.

Extreme summer heat in 2022 was estimated by ECB researchers⁠ to have added 0.7 percentage points to European food inflation. Further ECB research suggests that the economic effects of severe drought may persist for years, as damaged businesses invest less and depleted farms struggle to recover.

That does not mean every euro lost this summer is permanently gone. Freight delayed in August may move in October. A factory that reduces production can sometimes fill orders later. Agriculture represents a relatively small share of European headline output. Companies have also adapted since the Rhine droughts of 2018 and 2022. BASF acquired more vessels capable of operating in shallow water and helped develop systems that provide earlier warning of low flows.

The headline estimates should consequently be treated with caution. Researchers have suggested that this drought could cost Europe at least €50 billion, while one estimate places the effect nearer €75 billion. A much larger figure of €180 billion includes not only drought but the wider consequences of extreme heat: wildfires, damaged infrastructure, reduced labour productivity and deaths. These are not interchangeable measures, and presenting the highest number as the cost of drought alone would be misleading.

But the economic threat cannot be understood solely by totalling immediate losses. The more important change is that risks once treated separately are arriving together.

A shallow Rhine impairs industry. A shallow Danube impairs shipping and electricity generation. Dry soil reduces food production. Low reservoir levels restrict public water supplies. Heat raises electricity demand while warm, depleted rivers constrain generation. Each problem competes for the same diminished resource.

Into this contest Europe is introducing another large claimant.

The continent wants to expand its data-centre capacity to support artificial intelligence, cloud computing and digital services. More than a third of Europe’s roughly 3,000 data centres are located in areas classified as having high or extremely high water stress. Some use substantial quantities of water for cooling, either directly or indirectly through the electricity they consume.

The choice of cooling technology does not eliminate the problem. Air-based systems can reduce water consumption but generally require more electricity. Evaporative cooling can reduce electricity use while increasing water demand. Closed-loop systems reuse water, but still require energy and cannot abolish heat.

The real question is not whether Europe should have data centres. It is how water will be allocated when a river is simultaneously expected to supply households, irrigate farms, carry freight, cool a reactor and sustain new computing infrastructure.

That is a political question disguised as an engineering one.

Governments can build reservoirs, improve irrigation, repair leaking networks and create better connections between rivers, railways and roads. Industrial plants can recycle more water. Power stations can install turbines capable of operating at lower flows. Farmers can change crops, and data centres can be designed around local water conditions.

Yet adaptation is not a collection of painless technical improvements. Holding water in an upstream reservoir can reduce the amount available downstream. Protecting navigation may conflict with irrigation. Replacing barges with lorries increases congestion, fuel consumption and transport costs. Dry cooling saves water but demands more electricity precisely when the grid may be under pressure.

Every adaptation chooses a priority. It also chooses who will pay.

Only a small minority of European companies have completed formal plans for adapting to climate risks. Many governments still respond to drought as an emergency that begins when the rain stops and ends when it returns. The infrastructure required to manage water, however, takes years or decades to plan and construct.

In Vercelli, rice growers are asking the Italian state for reservoirs capable of capturing autumn and spring rainfall. Such projects may help preserve a crop that has shaped the landscape and identity of northern Italy for generations.

But the farmers also understand the timetable. The reservoirs needed in the next drought cannot be designed after it begins.

They should, one local farming leader said, have been built 30 years ago.

The drought arrived with astonishing speed. Europe’s vulnerability to it did not.