ELSENBORN, Belgium — The wildfires burning across Europe this summer have exposed a potentially deadly threat lurking beneath the blackened landscape: rusty bombs and mines from World War I and II that threaten crews responding to the flames.
Some of the weapons have exploded in the intense heat. Blasts have been reported in France, Belgium, Germany and the Netherlands, where a bomb-disposal team was dispatched to check a forest threatened by flames near a site of fierce fighting in the Limburg province in 1944.
Fueled by climate change, the fires and explosions show that the continent’s “climatic luck” is running out, said Sarah Njeri, a peace and conflict scholar at London’s School of Oriental and African Studies. Steady temperatures and predictable rainfall once ensured that most buried weapons stayed dormant.
“Climate change is now doing the work of unburying and reactivating what was previously stable,” Njeri said. Fires can ignite old munitions but can also burn away the scrub and brush that hides them.
This wildfire season was supercharged by heavy rains in January that spurred vegetation growth, which became kindling when the summer heat arrived. Those temperatures, combined with drought conditions, low humidity and stiff winds, offered an ideal environment for fire, according to a study issued last month by the World Weather Attribution group.
Flames chewed up old battlefields and set off buried explosives
As they advanced, the flames moved over territory that has long been known to hold unexploded weapons, a lethal legacy that lingered long after the guns fell silent.
In a forest in tinder-dry France, a massive wildfire outside the southwestern city of Bordeaux uncovered a cache of what is believed to be World War II-era ammunition.
In the eastern Belgian province of Liege, Gov. Hervé Jamar said “a few sporadic detonations” were recently heard and that emergency services were adapting to account for munitions buried in a fire area. He said no fire crews were in danger, but local media published photos of a firefighter handling a rusted bomb.
During World War II, booby traps, bombs and mines were sprinkled throughout the province’s dense peat-bog forest known as the High Fens. In the first four years after Germany’s surrender in 1945, the munitions killed six civilians, said Bernard Collard, a local historian who runs the Truschbaum Museum near Belgium’s border with Germany that houses a collection of found objects from the war.
“When you go into a forest like this, you are not sure where the explosives are,” he said. He remembers his father detonating a found bomb in a quarry.
The fire in the High Fens, which stretches across the border with Germany, is smoldering atop a much-bloodied battlefield where Nazis fought Allied troops. The Battle of the Bulge was fought in and around the High Fens.
The fire is even closer to the sites of two lesser-known skirmishes along Elsenborn Ridge and in the Hurtgen Forest, which lasted 88 days and killed about 33,000 American and 28,000 German troops.
Every year, Belgium responds to thousands of calls about explosives
Collard is authorized to scan with a metal detector the former battlefields, now forests, pastures and farmland. He has found mortar shells, machine guns, helmets, cigarette cases, and once, a human skeleton.
“You never know what you might come across, and you shouldn’t take it lightly,” Collard said while standing in a field that was once a blood-soaked site. Nearby, blueberry bushes cover old foxholes, trenches and deep craters from artillery fire.
He frequently works with the Belgian demining squad. “It’s part of our history. We live with it,” Collard said.
Unexploded ordnance is even more dangerous around wildfires because heat can trigger the explosives, said Jonas Tepe, a spokesperson for North Rhine-Westphalia, just across the border in Germany.
The Belgian Ministry of Defense said it receives requests from the region about every week to assist in disarming explosives, yet it does not consider the area a “hot spot” compared to elsewhere in Belgium. Such requests are even more common in the west, where farmers in towns such as Ypres — infamous for harrowing trench warfare in World War I — call the annual tilling of the soil “ the iron harvest ” because it turns up so many war remnants.
Every year across the nation, Belgium’s Explosive Ordnance Disposal and Destruction Service responds to more than 3,000 calls and disposes of 200 to 250 tons of munitions left over from both world wars.
Flames are not the only threat
Drought has also helped to lay the past bare by shrinking rivers and lakes to reveal old weapons.
In Slovakia, the Danube River fell and exposed two naval mines that police pulled out of the water and buried in a trench for a controlled demolition. Authorities in Hungary closed Budapest’s Margaret Bridge after a bomb dating from World War II emerged at its base in receding water.
As the Rhine dried up, German authorities also found a WWII-era bomb.
Christina Greene, a researcher at the University of Arizona who, with Njeri, wrote an article on Europe’s wildfires and unexploded ordnance risk, said “the legacy of war keeps creeping up” because of climate change.
“It’s reliving the legacies of war and conflict in a way that we haven’t had to deal with in a while in certain places.”
McNeil writes for the Associated Press. AP writers Mike Corder in The Hague, Netherlands; Sylvain Plazy in Brussels; Angela Charlton in Paris; Kirsten Grieshaber in Berlin; and Stanislav Hodina in Prague contributed to this report.
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