orecastIn mid-August the gauge at Kaub, the Rhine's most important measuring point, read nine centimetres — the lowest value since records began. Where water normally flows, gravel now lies in the sun, and in our new episode Werner stands right in the middle of it, paws covered in dust. Because as the water disappears, so does the hiding place: this summer the Rhine is giving back what it has kept covered for decades.
Nine centimetres, and what they mean
The chain of gauges reads like a fever chart: Kaub nine centimetres, Koblenz a single one, Worms minus fifteen, Emmerich minus twenty-two. For the record: a river gauge does not measure how deep the river is, but the water level above a fixed reference point — and that point differs at every station. Minus twenty does not mean the Rhine is empty. It means less water than was ever thought possible when the gauge was built.
The old record shows how unusual this is: twenty-five centimetres at Kaub, set on 22 October 2018, at the end of a long drought year, deep in autumn. This summer's value is well below that — in the middle of August. Freighters sail with half loads and ferries stand still — but our subject is what becomes visible once the water is gone.
Three finds in two weeks
Friday, 7 August, Koblenz, in the Wallersheim district: an anti-tank rocket from the Second World War is discovered on the dried-out bank — a so-called bazooka rocket. Rhineland-Palatinate's ordnance disposal service confirms it is real. The city says it plainly in its own press release — the low water led to this find. Four days later it is blown up in a controlled detonation with a rifle grenade — under water, where there still is some.
Then, on 12 August, Trebur in southern Hesse: a walker finds a grenade on the bank at night — and it is smouldering. White phosphorus stays quiet as long as it lies wet; dry in the open air it ignites on its own, no fuse, no touch. The disposal team makes it safe on the spot. In the same period, the Cologne papers report a bomb on the Rhine bank. Three finds in two weeks, on a single river.
The Koblenz statement, by the way, contains both: no danger to the public — and yet a hundred metres cleared before the detonation. That is not a contradiction. A find that lies still and is guarded can be managed. It becomes dangerous the moment someone touches it, moves it or takes it home. The danger is not the thing in the gravel. The danger is the hand that reaches for it.
Why there is anything down there at all
Spring 1945: the Rhine is the last great line of the war in the west. On its banks, a collapsing army leaves behind what it can no longer carry. Then comes what was hardly photographed and yet happened everywhere: ammunition is sunk. In the final weeks out of sheer haste; after the surrender, because stocks had to be handed in — and the river was closer than any collection point. Crate after crate, over the side of a boat, usually at dusk — no list, no map, no record.
Then the river takes over: sand and silt settle on top, floods push gravel across it, for eighty years. The Rhine becomes an archive — an archive that never had a catalogue. And by no means everything down there is war: ships have sunk and cargo has gone overboard since Roman times. A river collects everything. It just does not sort it.
How much is still down there? No authority will give a number. Asked directly, the ordnance disposal service says, word for word: that can only be guessed at. There simply never was an inventory — remember that sentence the next time a video tries to sell you a precise tonnage.
The Danube is one step ahead
What may still lie ahead for the Rhine can already be seen on the Danube — same summer, same missing rain. In northern Bulgaria, near the village of Ryahovo, a local resident finds bones in the dried-out riverbed. The regional museum confirms it: a mammoth. A lower jaw, two tusks, one rib — an animal of up to eight tonnes.
In Serbia, near Prahovo, the wrecks of the German Black Sea fleet rise out of the shallow water, scuttled in 1944, on the retreat, by their own crews; some still hold ammunition today. And near Budapest the Danube has released a Wehrmacht motorcycle, a DKW, with thirty-five anti-tank mines beside it. Ice age and world war in the same riverbed, in the same month. A river does not distinguish between the things it keeps. It simply keeps them.
If you find something: four rules
Which brings us to the heart of the episode. Alexander Majunke, head of the ordnance disposal service in Hesse, says of this ammunition that decades of weathering have made it unpredictable. Nobody can tell from the outside what state a find is in on the inside — which is why the disposal service treats every piece as if it were live. Rule one, then: do not touch it — do not move it, pick it up, dig it free or nudge it with your shoe. Rule two, distance: walk back the way you came, keep others away, children above all, and put the dog on the lead. Rule three: mark the spot — your phone knows your position, which is all the disposal team needs. Rule four: call 110, the German police emergency number. The police alert the disposal service — from there, professionals take over. You take nothing home, not even the small, harmless-looking piece as a souvenir. That one least of all.
If that sounds exaggerated, think of Trebur: for decades the grenade lay quiet, as long as it was wet; the moment it lay dry, it began to smoulder by itself. And you cannot tell from looking which case is in front of you. A find costs you one phone call and a few minutes of waiting; grabbing the wrong thing can cost you your hand — the call wins, every time. And if anyone is thinking of heading out with a metal detector on purpose: don't. Searching the shore zones requires a permit almost everywhere, and with ordnance it is simply life-threatening. The episode is a safety guide, not an invitation to go looking.
What the map shows
To close, our map. Along the Rhine, within a five-kilometre strip, more than five hundred archaeological sites are documented, along with two hundred and sixty-two bunkers and military installations from two world wars. One thing deliberately appears on no public map, ours included: the suspected-ordnance areas, which the federal states keep under lock and key for good reason. And the river does not only return dangerous things: near Neupotz alone, dredgers brought up more than a thousand Roman objects from the riverbed, over seven hundred kilograms, the largest Roman metal find in Europe.
If you want to know what is documented under your own town — find spots, old adits, wartime installations: the map will show you. This summer the Rhine is a history book lying open. Read it with your eyes. Not with your hands.