Operation Gomorrah: The Devastating Firebombing of Hamburg

Open a Bible to Genesis 19:28, and you will find one of the most infamous moments in Christian storytelling: “(Abraham) looked down toward Sodom and Gomorrah, toward all the land of the plain, and he saw dense smoke rising from the land, like smoke from a furnace.” The climax of the tale of Sodom and Gomorrah describes how the two cities looked the morning after God obliterated them in a rain of fire, killing all their sinful inhabitants. For most, it is a shocking moment, a brutal image that stays with you.

But for those who were in the German city of Hamburg on the night of July 27-28, 1943, Genesis 19:28 is more than a mere image. For the survivors, it is closer to a memory. That night, Royal Air Force Bomber Command unleashed Operation Gomorrah: an attempt to do to Nazi Germany what God did to the Cities of the Plain.

For nearly an hour, incendiary bombs rained onto Hamburg. What followed would be one of the worst firestorms in history. The inferno more than lived up to its codename, devouring sinners and innocents alike.

In a few short hours, up to 40,000 perished. Were they victims of divine justice, or of a callous war crime?

The Age of Annihilation and the Pivot from Precision Bombing

Every major war brings its own unique kind of suffering. The Boer War, for example, introduced the world to the horrors of civilian concentration camps. World War I introduced the mud and freezing misery of a conflict fought in trenches.

In the case of World War II, it was the terror of death from above. The London Blitz, the bombing of Rotterdam, the firebombings of Dresden and Tokyo—all through the conflict, the indiscriminate bombing of civilians became a gruesome hallmark. Yet, in the European theater, all would pale into insignificance beside the deadliest raid of all: Hamburg.

As aircraft technology improved over the interwar period, it had become clearer and clearer what devastation the future might hold. As early as 1932, former British Prime Minister Stanley Baldwin had voiced concern that “the bomber will always get through,” leading to a frantic race to kill as many civilians on each side as possible. Just five years later, Europe had gotten a sharp taste of this aerial destruction, as German planes bombed the town of Guernica in the Spanish Civil War, killing hundreds.

But it was with the outbreak of World War II that the age of annihilation from above really began. A single night in May 1941 would see 1,436 Londoners killed by air raids. A few months earlier, firebombs dropped onto Coventry not only killed 568, but nearly razed the city.

Yet even as the civilian toll grew, the Allies resisted revenge attacks. “This is a military and not a civilian war,” declared British Prime Minister Winston Churchill. In other words, precision bombing German military targets was fine, but not carpet bombing towns.

The only trouble was that the Allies struggled immensely with precision bombing. In 1941, Britain’s Bomber Command did the math, and discovered it was taking them five tons of bombs to kill a single German. Worse, only one in five of their bombs was dropping within five miles of the target.

Rather than destroying the German war machine, their raids were mostly frightening random farm animals. As Royal Air Force casualties mounted, it was decided a change in tactics was needed. This necessitated a pivot away from Churchill’s moral military war to something far less civilized.

Luckily, Bomber Command was about to fall under the sway of a man for whom civilization was synonymous with targeting. Arthur Harris was a hard man for a hard time. An advocate of area bombing, Harris’s solution to the RAF missing their targets was to simply make the targets bigger—like, say, the size of a city.

In 1942, the War Cabinet and Air Staff agreed to a plan that would have been unthinkable only a few months earlier: the aerial destruction of every German city with over 100,000 inhabitants. By now, Britain had lost some 40,000 civilians to the Blitz. On the continent, reports of Nazi atrocities were mounting.

Everyone was tired of fighting a civilized war. Besides, there were reasons to think brutal tactics could help end the carnage. During the Blitz, analysis had shown that civilians who lost their homes often failed to report for work the next day.

Destroy enough homes, and you could cripple German industry, even if the factories remained standing. Harris was fond of saying: “If you can’t hit the works, hit the workers.”

Engineering Operation Gomorrah and the Target of Hamburg

This strategic shift was just the beginning. Following massive investment in production in 1941, Arthur Harris now had under his command a staggering number of four-engine Avro Lancasters, each capable of carrying 8,000-pound payloads. Backed up with daylight precision attacks by the U.S.

Army Air Forces, Bomber Command could hit cities around the clock—destroying factories, homes, and everything in between. Everything was exactly what Harris wanted destroyed. If the Allies could demonstrate their firepower on a grand scale, the shock might so damage morale that Germany would surrender.

The plan was named Operation Gomorrah, after one of the cities God destroyed with fire from Heaven. Only, this time, it would not be a vengeful deity killing the sinners, but the cold fury of Arthur “Bomber” Harris. Once the decision had been taken to wipe out a city, there was really only one obvious target.

Hamburg was Germany’s second largest metropolis, home to both 1.7 million industrious citizens and the vital industries they worked on. Its harbors produced U-Boats and ships used in the war effort. Its port welcomed commerce from across occupied Europe.

Vital components were built in its factories. In short, it was both a military target, and the place where a wave of biblical destruction would make a definitive statement—on a par with wiping out modern-day Chicago. Hamburg was also close.

Perched near the northwest coast of Germany, Hamburg could be reached under cover of darkness even during the short summer nights. The Allies attacked at the height of summer because they wanted Hamburg to burn. The build-up to Gomorrah was a flurry of testing to try and figure out the best way to engulf the city in a sea of flame.

Luftwaffe incendiary attacks on London and Coventry had shown just how quickly fire could spread out of control, devouring all in its path. Now, the Allies wanted to do that on a grand scale—creating a fire so big it would keep feeding itself long after the last bombs had fallen. That meant taking advantage of dry weather conditions and new American inventions like napalm.

But it also meant researching the materials used in building Hamburg’s homes, experimenting with different combinations of explosives to get the best result. In the end, a mix of heavy bombs and incendiaries was selected. The heavy bombs would blow out windows, damage roads, and destroy water mains, hindering the chance of anyone being able to fight the fires.

Yet it was not just destruction the researchers focused on. They also needed a way to escape Hamburg’s defenses. Given it was the Reich’s second-biggest city, Hamburg was heavily protected.

The city fairly bristled with flak cannons and searchlights, all deadly to aircraft, and all controlled by an advanced radar network. Failing to penetrate this ring of death meant it did not matter how powerful the firebombs were. Fortunately, the Allies had the perfect window of opportunity.

The invention of Welsh physicist Joan Curran, Operation Window was a top-secret weapon designed to render radar all but useless. Gigantic bundles of aluminum strips, known as Window, could be dropped from planes. As the strips fell, they would bounce signals back to German radar stations, giving the impression of a sky filled with objects.

With no way of telling what was an enemy aircraft, Hamburg’s guns would simply blast uselessly away, allowing the RAF to swoop in untouched. It was a tactic both extremely effective and extremely simple. In fact, it was so simple that the Germans had invented their own version some time before, named Düppel.

Because it worked so well, Hermann Göring feared that Allied spies would discover it and steal the idea. He ordered all work halted and all research destroyed, including research into possible countermeasures. This is why, in July 1943, one of Germany’s most important cities would be completely defenseless against radar chaff.

The Initial Raids and the Implementation of Window

Back in Britain, Arthur Harris finally confirmed Hamburg as the target on May 27, 1943. It was decided the RAF would hit the city’s civilian center at night, while the Americans would target the factories south of the Alster River by day. At last, on July 22, Harris took a meeting with meteorologists.

They told him the skies over Hamburg would clear in a couple of days. With that, the proud, Hanseatic city’s fate was sealed. Nothing could now save it from the wrath of aerial bombardment.

Although it would be the night of July 27-28 that went down in history, Operation Gomorrah began a few days earlier—at exactly 9:45 p.m. on July 24. That evening, a Short Stirling bomber rumbled into life at an airfield outside Cambridge, taking off into a sky still not yet fully dark. Over the next 75 minutes, more planes followed: Mosquitoes, Halifaxes, and Lancasters, rising up into the gathering gloom and departing for the distant continent.

All told, some 790 bombers would depart England that night, following the lights of blazing marker bombs dropped by pathfinders. At twenty past midnight, the first signs of the approaching force appeared on Nazi radar screens. Defensive aircraft were prepared and flak cannons were trained.

But then the city’s defenses went haywire. Suddenly, radar screens were filled with confusing signals. Unable to get a lock on the approaching planes, gunners on the ground resorted to firing wildly into the air, hoping for the best.

What they got instead was a lesson in systematic destruction. Sometime just before 1:00 a.m. on July 25, the first bomb bay doors opened, and Gomorrah’s rain of destruction began. For fifty minutes, the RAF pounded the city, obliterating whole western districts.

With radar useless, the Germans only managed to take out three of the attacking craft. Three out of nearly 800 was a pitiful amount. By contrast, the damage inflicted by the British was immense.

Heavy bombs took out the telephone exchange, exploded water pipes, and destroyed air raid shelters. By early morning, some 54 miles of streetfront were on fire. Buildings collapsed with people still trapped in them, while others were killed by flaming debris.

Overall, 1,500 people died in Hamburg that night. The sun rose on a smoking, smoldering city as brutalized as London had been during the worst nights of the Blitz. Had the raids stopped now, Arthur Harris could have still claimed victory.

But, rather than stopping, Gomorrah had only just begun. Across the North Sea, pilots in the U.S. Eighth Air Force were already preparing for the day ahead.

Some 323 B-17 Flying Fortresses shuddered to life for a daylight raid on the wounded city. Around 4:30 p.m. on July 25, workers in the Blohm & Voss U-boat yards looked up to see the latest wave approaching. Over just twelve minutes, the Americans dropped their bombs onto the industrial area.

While only 20 workers were killed, the follow-up raid still caused immense panic, terrifying the population and further tying up Hamburg’s already stretched emergency services. It was psychological warfare from the air. An unrelenting wave of attacks designed to scare and intimidate, and Bomber Command had no intentions of letting up.

With the smoke from the fires too thick for another major run, the city was buzzed that night by de Havilland Mosquitoes. It was a minor assault, but one that kept residents sick with fear. Just hours later, 50 U.S. bombers returned, this time aiming for as many industrial hubs as possible.

In a one-minute attack beginning at noon, American forces smashed up factories, destroyed docks, and took out a major power station, plunging nearly half the city into a blackout. In their wake, the Americans left another 150 dead, and a city further paralyzed. By now, swathes of Hamburg were in flames.

The city’s infrastructure was close to collapse. Thousands upon thousands were homeless, wounded, or dead. Yet, when people later looked back on those grim days of the first raids, they would seem like a paradise compared to what came next.

The night of July 27-28 was about to introduce a whole new, hideous weapon into the arsenal of war: the firestorm.

The Firestorm and the Devastation of East Hamburg

As the west and south of Hamburg burned, survivors began to flood the city’s east. There, the densely packed working-class districts of Borgfelde, Hammerbrook, and Hamm stood, their tall apartment blocks groaning under the weight of thousands of people. Watching the fires still engulfing the rest of the city, the workers felt relief that no bombs had dropped near them.

After all, several hot days had left their district so parched and dry that any flame would be near impossible to put out. That was exactly what the RAF were counting on. After a day of rest, Operation Gomorrah restarted on the evening of July 27.

This time, over 720 bombers took off just after sunset, heading for Hamburg not directly, but coming in over Lübeck in the east. It is said the guns around Lübeck did not even try firing at bombers as they passed through the night—the local commander too scared they would loop around and bomb his city instead. At last, just before 1:00 a.m. on July 28, the drone of heavy bombers could be heard over Hammerbrook, Borgfelde, and Hamm.

For uncountable locals, it would be the last sound they ever heard. The destruction which befell east Hamburg that night was nothing short of biblical. Helped by the dry conditions, individual fires quickly linked up.

They joined together and expanded, becoming one vast ocean of flame. As the inferno spread, temperatures spiked, hitting a minimum of 800 degrees Celsius. This was hot enough to make stone glow, enough to make glass shatter, and enough to make wood, fabric, and hair spontaneously burst into flames.

In such heat, vehicles exploded, adding to the chaos. Apartment blocks turned into towers of flame, with everyone inside burning up in a matter of moments. Clothing seared onto skin and flesh melted.

In basements and air raid shelters, all the oxygen was sucked out, leaving thousands to suffocate. But even this horrific reality had nothing on the wind. As heated air shot skywards, the fire sucked in oxygen from the surroundings, until winds whipped through the streets at nearly 250 kilometers per hour—fast enough to drag people into the fire.

As it did so, it gave an awful howling, the sound of air being channeled down narrow streets. To those present, though, it did not sound like wind. It sounded like some invisible demon, shrieking in triumph.

It was a fitting image for such a hellish night. Nineteen-year-old Kate Hoffmeister saw scores of people fallen on the road; the melted asphalt stuck to their skin, holding them in place as they screamed for mercy. Henni Klank recalled watching as trees spontaneously burst into flame in the superheated air, and as escaped horses ran past in panic, their hair alight and their flesh already burning.

Peering out from under a blanket soaked in water, Heinrich Johannsen could only watch in horror as his neighbors turned into human torches, consumed by the firestorm. Amid this nightmare, survival was often down to sheer, dumb luck. Those close enough could leap into canals, or run for open spaces and wastelands devoid of fuel for the fire.

Those who happened to have sealed public shelters in their neighborhood were saved the loss of oxygen. Mostly, though, anyone caught in the heart of the inferno simply burned. At 1:47 a.m., the last Allied bomb fell onto Hamburg.

By now, columns of smoke were rising 20,000 feet over the city. The glow of flames could be seen for miles around, casting dark shadows across the nearby countryside. As the planes turned back for England, a black rain began to fall—the result of hot smoke hitting cool air high up in the atmosphere.

But for Hamburg’s citizens, the ordeal was far from over.

The Aftermath and the Grim Clean-up Operations

The night of Gomorrah’s peak, 2,326 tons of bombs fell on Hamburg—more than three times that dropped on London during the worst night of the Blitz. Twelve square miles of the city were destroyed, and 16,000 apartments were reduced to shells, leaving nearly half a million homeless. The fire still raged over its charred victims.

Up in the air, the retreating British forces reported they could smell burning flesh even from a distance. For some, the sight of Gomorrah was a cause for celebration. “Brilliant,” declared gunner Douglas Fry, “better than earlier raids!”

But others were more pensive, looking down on the devastated city. “Hamburg raised for me for the first time the ethics of bombing,” Flight Officer Trevor Timperley later admitted, saying he could not stop thinking about the children killed: “They were not involved, so you were left with a terrible feeling about them.” And terrible is exactly how survivors in Hamburg felt.

At 4:00 a.m., Nazi command made the decision to evacuate all nonessential civilians from the shattered city. What followed was a modern exodus. With all but three of the railways smashed, up to a million people fled Hamburg on foot.

Refugees dispersed into the German countryside like smoke into the summer skies. All around them lay the charred bodies of the dead. Fifteen-year-old Traute Koch remembered thinking at first they were tailor’s dummies someone had left out in the street.

There were just so many of them; it seemed impossible that many people could have died in one night. But if things were bad for the citizens of Hamburg, they were even worse for those the Nazis deemed subhuman. Faced with the scale of destruction, orders were sent to the Neuengamme concentration camp to supply workers for the clean-up.

At the time, Neuengamme and its 85 subcamps mostly held Polish and Soviet prisoners of war. Now untold numbers of them were marched into the ruins of Hamburg and forced to recover the dead and bury them in mass graves. It was gruesome, miserable work.

Aside from the sheer scale of destruction, there were the vermin that swarmed the ruins. Black rats grew fat on scavenged human remains. Worse still was in store for the common criminals the Nazis dragooned into helping with clearance.

Organized into suicide squads, they were sent to try and manually defuse the bombs that failed to explode on impact. Not surprisingly, this only added to the attack’s death toll. Some 450 miles away in London, the feeling was very different.

The RAF had lost just 21 planes in the raid, less than three percent of all those sent out. Meanwhile, the utter annihilation of Hamburg had gripped the press. Newspapers declared “Hamburg Smashed!”

and compared the attack to what the Nazis had done to Coventry. Even this early on, though, it was clear Gomorrah was on a whole other scale. The most commonly cited death toll for Gomorrah is between 35,000 and 40,000, the majority of whom died on the night of July 27-28.

By way of comparison, the entire Blitz is thought to have killed 43,000 Britons over the course of eight months. There had simply never been an air raid on this scale before. Nor was it yet over.

Forty-eight hours after he unleashed hell on the city, Harris sent another 770 bombers back to Hamburg. Although many had been evacuated, there still remained emergency services, necessary workers, and those too old or infirm to leave. That night there was a second firestorm.

While far fewer perished this time around, the number of dead was still anywhere between several hundred and a few thousand. The last raid came on August 3. This time, an apocalyptic thunderstorm scattered the bombers and blinded the pilots.

The bombs fell randomly, smashing the opera house but failing to start another vast fire. With that, Operation Gomorrah officially ended, but its effects would last for years.

Historical Reckoning and the Legacy of Firebombing

Six years before Gomorrah, the bombing of Guernica had caused global outrage. Although as few as 250 are thought to have died, the images of widespread aerial destruction shook the world, leading Pablo Picasso to create a vast mural to commemorate it. Yet Gomorrah would make what happened at Guernica look microscopic by comparison.

Over eight nights, 9,000 tons of bombs had fallen on Hamburg. Half the city’s homes were gone, along with 24 hospitals, 277 schools, and 580 industrial sites. The fires burned for weeks, and the city remained paralyzed for months.

For the survivors, the trauma would last a lifetime. But the effects were felt beyond just Hamburg. Across Germany, a cold fear began to grip those in other large cities.

As rumors spread, so too did the whispered question of who would be next. For many, the answer would unfortunately be an affirmative. Back in Britain, the success of Gomorrah had convinced Arthur Harris that large-scale area bombing was both possible and the ideal way to bring about the end of the war.

Soon, the skies of Germany would become thick with Allied aircraft, beginning a pattern of destruction that would devastate around 130 cities. In some cases, the firestorm that engulfed Hamburg would be repeated. Kassel, Darmstadt, and infamously Dresden would all burn, their centers reduced to nothing but ash and memories.

Nor would the tactic be confined to Europe. Over in the Pacific theater, Harris’s American equivalent, Curtis LeMay, would implement a series of devastating raids on Japanese cities modeled after Gomorrah. The worst would come on March 10, 1945, when firebombs were dropped on Tokyo.

The destruction that night would be so great, the firestorm so grand, that even Hamburg’s apocalypse would pale beside it. To this day, it remains the deadliest air attack ever carried out on a city. And yet, the grim reality is that much of it may have been strategically unnecessary.

Although Hamburg’s razing left a huge psychological impact—terrifying even Nazi propaganda minister Joseph Goebbels—the effect was less acute than the Allies had hoped. Harris had pictured one or two major attacks forcing Germany to sue for peace. Instead, the Reich plowed on with its war of annihilation, refusing to surrender even as more cities went up in flames.

They fought on to the bitter end, no matter how many bombs the RAF dropped. Many historians have even argued that Harris’s tactics became counterproductive. Hurling everything at military targets could have ended the war sooner than terrorizing Germany’s citizens.

Yet, flush with the success of Gomorrah, Harris refused to change tack. Because of this, countless civilians would die. The firebombing of Hamburg occupies a strange place in the collective memory, both in Germany and abroad.

While the 1945 destruction of Dresden has become a stand-in for the horrors of the air war, the far deadlier raid on Hamburg remains little known and rarely commemorated. Partly, that may be because—unlike Dresden—Hamburg was a well-defended military target. It was a place that made perfect sense for the Allies to attack.

Then there is the way Germany itself remembers the war. In a nation deeply aware of the scale of Nazi atrocities, commemorating Gomorrah is difficult. While a museum exists in Hamburg, the exhibition takes care to contrast the city’s suffering with that of Coventry and London in the Blitz, or the suffering of those in the nearby Neuengamme concentration camp.

It is telling that, during one commemorative event held several years back, a group of German protestors held up a banner declaring that for Operation Gomorrah, there is nothing to mourn. Yet it would be a historical failure if the bombing of Hamburg was allowed to slip into the shadows. Here, for perhaps the first time, the sheer destructive power of aerial bombing was demonstrated in full.

It was a power that would shape civilian experiences for the rest of the war, both in Germany and in Japan. Historians may still debate whether Gomorrah was a legitimate tactic or a war crime, but the scale of the devastation demands historical memory of the night of July 27-28, 1943—the night when a once-great city was destroyed by fire from heaven.

Frequently Asked Questions

Why did Arthur Harris shift from precision bombing to area bombing?

By 1941, Bomber Command’s own analysis showed it was taking five tons of bombs to kill a single German, and only one in five bombs fell within five miles of the intended target. Rather than continuing to miss precision targets at great cost, Harris’s solution was to make the targets bigger — entire city districts — so that even inaccurate bombing would cause serious destruction. The War Cabinet and Air Staff formally agreed to this approach in 1942.

What was Operation Window and why was it so effective?

Operation Window involved dropping huge bundles of aluminum strips from aircraft. As the strips fell, they reflected signals back to German radar stations, filling screens with false contacts and making it impossible to distinguish real bombers from chaff. Hamburg’s extensive radar-guided defenses were rendered useless, and on the opening night of Gomorrah, fewer than three of nearly 800 attacking aircraft were shot down.

What caused the Hamburg firestorm on the night of July 27-28?

The RAF deliberately targeted Hamburg’s densely packed eastern working-class districts after days of hot, dry weather had left the buildings parched. Individual fires quickly merged into a single vast inferno, driving temperatures to at least 800 degrees Celsius. The superheated air rising from the blaze sucked in oxygen from the surroundings, generating winds of nearly 250 kilometers per hour that dragged people into the flames and left survivors trapped in oxygen-starved basements.

How deadly was Operation Gomorrah compared to other raids of the war?

The most commonly cited death toll is between 35,000 and 40,000, the majority dying on the single night of July 27-28. For comparison, the entire eight-month London Blitz killed approximately 43,000 Britons. The scale of Gomorrah was so unprecedented that it convinced Harris to continue area-bombing roughly 130 German cities, though the strategy never forced Germany to surrender as he had predicted.

Why is Operation Gomorrah less remembered than the bombing of Dresden?

Historians suggest that Hamburg’s status as a well-defended military and industrial target makes it harder to frame as a straightforward atrocity compared to Dresden. Germany’s own collective memory also complicates commemoration, since the country is acutely conscious of Nazi atrocities; one commemorative event even saw German protesters hold a banner declaring there was nothing to mourn. The far deadlier Hamburg raid has consequently received less public attention than the smaller but more symbolically charged Dresden attack of 1945.

Sources

1. https://www.bbc.com/news/uk-england-43546839
2. https://www.nationalgeographic.com/history/article/the-bombing-of-hamburg-foreshadowed-the-horrors-of-hiroshima
3. https://www.historynet.com/allied-aerial-destruction-of-hamburg-during-world-war-ii.htm
4. https://www.spectator.co.uk/article/children-of-gomorrah
5. https://www.airforcemag.com/article/0307gomorrah/
6. https://www.biblegateway.com/passage/?search=Genesis%2019&version=NIV