An El Niño forming in the Pacific is on track to be the strongest in roughly 150 years: across fourteen models, the median peak sea-surface temperature sits roughly 0.8 °C above the 2015–16 record, and 2027 global warming of 1.7 °C is creeping toward the Paris Agreement threshold. NOAA has put the chance of a strong El Niño at 80 percent. And Europe has already produced the physical evidence — drought has dropped Danube water levels so far that a World War II naval mine resurfaced from the riverbed, and Romania's Cernavodă nuclear plant is counting down to shutdown. Japan's attribution ledger ("essentially impossible without global warming") and Germany's death ledger (about 11,900 heat-related deaths, more than three-quarters of them elderly) converge next: attribution and settlement, two evidence chains pointing to the same conclusion.
On August 4, workers near the Slovak village of Vlky discovered a 700-kilogram contact naval mine on the bed of the Danube. It had slept for more than eighty years — dropped in 1944 by the Royal Air Force during Operation Garden, intended to sever German supply lines — and has now resurfaced of its own accord because the river has grown shallower. It was the heaviest piece of ordnance ever disposed of in Slovakia; explosives technicians hauled it to a pit five meters deep and detonated it there, and Danube navigation was temporarily restricted.
The mine is, in itself, a war relic. But the way it has returned to view is a climate relic: it surfaces under headlines reading "European heat wave drives down Danube water levels" and "Europe's great artery, the Danube, runs dry." A week earlier, scientists delivered a more alarming forecast — an El Niño forming in the Pacific is on track to become the strongest in roughly 150 years.
The Forecast: 0.8 °C Above the 2015–16 Record
On July 23, at a press briefing held by the California non-profit research organization Berkeley Earth, climate scientist Zeke Hausfather presented a suite of climate-model forecasts for the forming event. The projected peak intensity far surpasses the previous record — "so large it is shocking," in his words. Comparing data from fourteen models, the median forecast for the peak sea-surface temperature in the Pacific sits roughly 0.8 °C above the all-time high set during 2015–2016.
If the forecast holds, the El Niño will release large amounts of heat from the ocean, and that release will stack on top of the warming driven by anthropogenic climate change, making a 2027 global mean temperature 1.7 °C above pre-industrial levels "not entirely out of the question." That would bring the world uncomfortably close to the 1.5 °C warming threshold — the very line that nations pledged in the Paris Agreement to avoid.
The U.S. National Oceanic and Atmospheric Administration (NOAA) is no less bracing: by the end of this year, there is an 80 percent chance the event will develop into a strong El Niño, and it is almost certain to persist at least into April 2027. Michelle L'Heureux, who leads NOAA's ENSO forecast team, noted that every signal indicates that ocean–atmosphere coupling in the equatorial Pacific is highly active, "which makes us more confident that a strong El Niño will ultimately form — one that ranks among the strongest on record."
Hausfather also points out that, beyond El Niño's push to make 2027 the record year, the warming over the coming months could plausibly make 2026 itself the hottest year on the instrumental record. In other words, whether we look at this year or next, the record is being rewritten.
The Physical Evidence: The Danube Has Spoken First
The El Niño–Southern Oscillation (ENSO) is a natural fluctuation of tropical Pacific sea-surface temperatures and winds, oscillating every two to seven years between the warm El Niño phase and the cool La Niña phase; the most recent El Niño ran from 2023 to 2024. Justin Mankin of Dartmouth College offers a reminder: this looks very much like what they have forecast — El Niño amplified, late in this century, by human-driven climate change.
The Danube's mines are a concrete cross-section of that amplification. Heat and drought are not abstract curves; they are the physical reality that exposes the bed of a European artery and brings eighty-year-old ordnance back into human view. The heat waves, droughts, floods and wildfires that travel with El Niño are moving from forecast into the schedule — and their economic consequences for the global economy are no longer a long-horizon question.
The Transmission Path: Cernavodă Nuclear Plant's Shutdown Countdown
The falling water level has quickly stretched from "historical relic" into "operating infrastructure." On August 4, Romeo Urjan, the plant manager at Romania's Cernavodă nuclear power station, warned that because of the drought and critically low Danube water, the plant could fully cease generating electricity within days.
Cernavodă is Romania's only nuclear power station, and Danube water directly participates in its operation. On August 3, the Romanian military used 100 kilograms of explosives to blast apart an underwater rock in the riverbed in order to redirect the flow — Urjan says that without the move the plant would have shut down within five days, and that with it the plant can "run for a few more days." A similar episode occurred in 2003, when one reactor had to be taken offline for an entire month.
This is no isolated incident — it is the middle link in a drought chain. On July 31, the Romanian government had already declared an alert state for the energy sector: one of the plant's two reactors had already been shut down, and the government reached an agreement with large industrial users to voluntarily cut electricity consumption in evening hours. The Czech Republic's largest reservoir, Orlík, was simultaneously releasing water by force to maintain navigation on the Vltava and the Elbe; its water level dropped one meter in a single week, and experts warned it would fall further.
Reading the three events together, Europe's drought is attacking three systems at once: navigation (the Danube–Elbe corridors), power generation (Cernavodă's cooling water), and electricity supply (the alert state). The mines surfacing in the riverbed are only the most photogenic episode of this drought; the nuclear plant's countdown to shutdown is when the drought first enters the energy bill.
The Cernavodă case shows that a drought's blow to the energy system does not pass through markets; it acts directly on the physical layer — cooling water shortfalls collapse generating capacity, and there is no quick substitute in another fuel. European nuclear plants widely depend on river cooling, so the Danube water crisis could be replicated at other river-cooled facilities across the European Union.
Japan's Attribution Evidence — Without Global Warming, This Kind of Heat Would Almost Never Happen
Where Europe manifests the drought in nuclear cooling water, Japan has, for the first time, produced a precise attribution ledger for extreme heat. On August 3, Japan's Center for Extreme Weather Attribution published an analysis: the extreme heat seen since mid-July 2026 has been amplified by global warming — and without global warming, a heat event of this magnitude would "almost certainly never have occurred."
The numbers are concrete. From July 11 to 25, the mean air temperature at roughly 1,500 meters altitude over western and southern eastern Japan reached 20.3 °C — the second-highest for the same period since 1950. From July 20 to 27, more than 200 observation stations across Japan recorded daily highs at or above 35 °C every single day, with 298 stations reaching that level on July 22. The contrast in attribution probability is even more striking: under the 2026 climate conditions that include global warming, the probability of the high-altitude temperature exceeding 20.3 °C is roughly 2.7 percent — a one-in-37-year event; taking the 1991–2020 mean climate as the baseline, that figure falls to roughly 1.4 percent — about one in 74 years; and without human-driven global warming, the probability drops to roughly 0.006 percent — almost never happens.
Two records bracket the severity of the heat: western Japan saw its highest mean temperature for mid-to-late July since records began in 1946; from July 21 to 25, the country logged five consecutive "extremely hot days" above 40 °C — the longest such streak since 2010. What is unusual is the El Niño backdrop: El Niño normally reduces the probability of extreme summer heat in Japan, but this year's probability was barely affected.
The Danube's mines and Cernavodă's countdown are the European slice of the drought; the Japanese attribution center supplies the Asian slice — with a quantitative conclusion. Global warming lifted the probability of this kind of heat from 0.006 percent to 2.7 percent, an independent evidence chain that runs alongside "the amplification of El Niño."
Germany's Death Ledger — 11,900 People and the Annual Settlement with Heat
For the first time, the cost of European heat has been laid on the table as an annual death statistic. On August 6, Germany's Robert Koch Institute released a report: as of July 26, around 11,900 people in Germany had died of heat-related causes this year — more than the full-year total of any year since 2016 (the previous high was roughly 9,000 in 2018). Conservative estimates attribute about 9,600 of those deaths to the late-June heat wave, and the actual number may rise further.
Death is not evenly distributed; age is the sharpest dividing line. People aged 75 and over bear the overwhelming share of the impact: roughly 6,060 deaths among those aged 85 and above, and about 2,910 among those aged 75 to 84 — the two cohorts together account for roughly 8,970 deaths, more than three-quarters of the heat-related total. Since June, temperatures in multiple parts of Germany have hovered around 40 °C, a level the Robert Koch Institute describes as "extremely rare" for the country.
Japan's attribution evidence answers "how likely is this kind of heat" — without global warming, it would almost never happen; Germany's ledger answers "how many people has the heat actually killed" — 11,900, with more than three-quarters of them aged 75 and over. Attribution and settlement, two evidence chains, converge here.
The page holds three distinct evidence chains in parallel — a forecast (fourteen-model median peak +0.8 °C above the 2015–16 record; NOAA's 80 percent strong-El Niño call), a physical-economy ledger (the Danube's WWII mines, Cernavodă's countdown, Romania's energy alert state, the Orlík reservoir dropping one meter in a week), and an attribution-and-settlement ledger (Japan's 0.006 percent → 2.7 percent shift; Germany's 11,900 heat-related deaths). Each chain measures a different distance from the same event; together they sketch the order-of-magnitude consequences that a 150-year-strength El Niño is already beginning to deliver.