Record rainfall leading to flooding that killed 24 people in Europe earlier this month was twice as likely due to human-caused climate change, a study has found.
The flooding took place across central Europe after Storm Boris stalled over the region from Sept. 12 to Monday last week, inundating Poland, Romania, Slovakia, Austria, the Czech Republic and Germany with the heaviest rainfall ever recorded in some areas and affecting almost 2 million people.
“Our study has found the fingerprints of climate change in the blasts of rainfall that flooded central Europe,” said Joyce Kimutai, a researcher at Imperial College London and one of the contributors to the report by World Weather Attribution (WWA).
A man stands on a flooded street after heavy rainfalls in Litovel, Czech Republic, on Monday last week.
Photo: Reuters
“Yet again, these floods highlight the devastating results of fossil fuel-driven warming,” Kimutai said.
Global warming is leading to more intense rainfall, because a warmer atmosphere can hold more moisture than a cooler one, WWA said.
Similar storms will become 50 percent more frequent in central Europe and drop 5 percent more rain if warming reaches 2°C, the scientists said.
The researchers used weather data and climate models to show the effects of climate change on weather patterns, and compared the rainfall’s likelihood and intensity with that of the climate before the current warming trend. Earth’s climate is about 1.3°C warmer than the preindustrial period, and Europe is warming faster than other parts of the world.
“We need to prepare for even more heavy rainfall than what is predicted from these models,” Friederike Otto, coleader of WWA, said at a news conference on Tuesday ahead of the report’s release.
Despite the record levels of rainfall, the death toll in central Europe was lower than in previous, less widespread flooding events. This is because early forecasting allowed authorities to prepare by creating flood defense walls, emptying reservoirs and issuing warnings. In 2002, floods killed 232 people across a similar region. However, the impacts this time were still significant, with widespread damage to homes and infrastructure.
“These floods indicate just how costly climate change is becoming. Even with days of preparation, floodwaters still devastated towns, destroyed thousands of homes and saw the European Union pledge 10 billion euros in aid,” Red Cross Red Crescent Climate Centre technical adviser Maja Vahlberg said.