Europe is facing its fifth round of dangerously high temperatures this summer, the New York Times reports. Now climate scientists wonder if global warming is doing more than raise temperatures... The weather patterns that create heat domes aren't new, but today they arise on top of the warming caused by greenhouse gas emissions. That makes it more likely that heat waves reach record-shattering temperatures for long stretches. But other environmental changes — natural, human-influenced or both — might also be causing heat domes to become more frequent and longer lasting. And it's these changes that scientists around the globe are trying to puzzle out. One change has to do with the Arctic. The differences in temperature between the hot Equator and the frigid far north help keep weather moving around the Northern Hemisphere. But with the top of the world now warming at several times the pace of the rest of the globe, those temperature gradients are narrowing. That might be causing the movements of weather systems to become more sluggish, producing more persistent heat waves. In Europe, reduced air pollution could be having a similar effect. Industrial emissions can contain particles called aerosols that reflect sunlight. Curbing aerosols has improved air quality, but it may also have altered the way air moves across the continent. Scientists haven't come to firm conclusions about how these shifts might be affecting European summers, said Antje Weisheimer, a climate scientist at the University of Oxford. The complex, fine-scale interactions in the atmosphere that drive weather dynamics are tough to capture in computer simulations, Dr. Weisheimer said. "It's tricky," she said. "We're making small progress." Dim Coumou, a professor of climate science at the Dutch university VU Amsterdam, sees artificial intelligence as one way forward. In a recent study, he and his colleagues used an A.I. algorithm to help a weather model better predict summer temperatures in Europe. They not only improved the model's forecasts; they also discovered why some of the model's predictions had been off: It misrepresented the way conditions in the western Pacific Ocean influenced atmospheric patterns that eventually made their way to Europe. With A.I., "we can also learn what the climate models are missing," Dr. Coumou said.

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"The European Union's Copernicus climate monitoring service confirmed Monday that June and July were the hottest on record in western Europe," .according to a report from the CBC. "The period saw an estimated 25,000 heat-related deaths." CNN has before-and-after photos of Europe's dried rivers, calling it "a crisis so dire it can be seen from space" River levels are so low that commercial ships have had to reduce their loads by as much as 80% to avoid running aground. It's disrupting supply chains and making shipping more expensive. Other effects of Europe's drying rivers The BBC reports that Romania has "shut down its only nuclear power station because of extremely low water levels in the Danube river." A bridge built in the year 39 AD by the Roman emperor Caligula "is usually entirely underwater," reports CNN, but this year full blocks of the ancient structure are visible, giving archaeologists a rare opportunity to study it." The reports adds that drying Tiber has also now also revealed formerly submerged e-bikes, scooters, refrigerators and a car." The CBC reports a dozen Nazi warships scuttled in a river during the Second World War are now resurfacing as water levels plunge. "Elsewhere, the drying Danube has revealed a German military motorcycle in Hungary, an unexploded 700-kilogram British bomb in Slovakia, and what are believed to be the ancient remains of a mammoth in Bulgaria."

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