PARIS: Floods have been tearing a path of destruction across the globe, hammering Kenya, submerging Dubai, and forcing hundreds of thousands of people from Russia to China, Brazil and Somalia from their homes.
Though not all directly attributed to global warming, they are occurring in a year of record-breaking temperatures and underscore what scientists have long warned — that climate change drives more extreme weather.
Climate change isn’t just about rising temperatures but the knock-on effect of all that extra heat being trapped in the atmosphere and seas.
April was the 11th consecutive month to break its own heat record, the EU climate monitor Copernicus said on Wednesday, while ocean temperatures have been off the charts for even longer.
“The recent extreme precipitation events are consistent with what is expected in an increasingly warmer climate,” Sonia Seneviratne, an expert on the UN-mandated IPCC scientific panel, told AFP.

Warmer oceans mean greater evaporation, and warmer air can hold more water vapor.
Scientists even have a calculation for this: for every one degree Celsius in temperature rise, the atmosphere can hold seven percent more moisture.
“This results in more intense rainfall events,” Davide Faranda, an expert on extreme weather at the French National Center for Scientific Research (CNRS), told AFP.
In April, Pakistan recorded double the amount of normal monthly rainfall — one province saw 437 percent more than average — while the UAE received about two years worth of rain in a single day.
This, however, doesn’t mean everywhere on Earth is getting wetter.

Richard Allan from the University of Reading said “a warmer, thirstier atmosphere is more effective at sapping moisture from one region and feeding this excess water into storms elsewhere.”
This translates into extreme rain and floods in some areas but worse heatwaves and droughts in others, the climate scientist told AFP.
Natural climate variability also influence weather and global rainfall patterns.
This includes cyclical phenomenon like El Nino, which tends to bring heat and rain extremes, and helped fuel the high temperatures seen over land and sea this past year.
While natural variability plays a role “the observed long-term global increase in heavy precipitation has been driven by human-induced climate change,” said Seneviratne.
Carlo Buontempo, a director at Copernicus, said cycles like El Nino ebb and flow but the extra heat trapped by rising greenhouse gas emissions would “keep pushing the global temperature toward new records.”

Considering the overlapping forces at play, attributing any one flood to climate change alone can be fraught, and each event must be taken on a case-by-case basis.
But scientists have developed peer-reviewed methods that allow for the quick comparison of an event today against simulations that consider a world in which global warming had not occurred.
For example, World Weather Attribution, the scientists who pioneered this approach, said the drenching of the UAE and Oman last month was “most likely” exacerbated by global warming caused by burning fossil fuels.

ClimaMeter, another rapid assessment network who use a different methodology, said major floods in China in April were “likely influenced” by global warming and El Nino.
“It can be difficult to disentangle global warming and natural variability” and some weather events are more clear-cut than others, said Flavio Pons, a climatologist who worked on the China assessment.
In the case of devastating floods in Brazil, however, ClimaMeter were able to exclude El Nino as a significant factor and name human-driven climate change as the primary culprit.

Many of the countries swamped by heavy floods at the moment — such as Burundi, Afghanistan and Somalia — rank among the poorest and least able to mobilize a response to such disasters.
But the experience in Dubai showed even wealthy states were not prepared, said Seneviratne.
“We know that a warmer climate is conducive to more severe weather extremes but we cannot predict exactly when and where these extremes will occur,” Joel Hirschi from the UK’s National Oceanography Center told AFP.
“Current levels of preparedness for weather extremes are inadequate... Preparing and investing now is cheaper than delaying action.”

KINSHASA: Eastern DR Congo faces a “humanitarian catastrophe” after being hit by severe flooding affecting about half a million people, the UN World Food Programme said Wednesday.

“Heavier rainfall than usual during the rainy season, prompted by climate change, has forced rivers and lakes to overflow, swallowing towns, villages and roads on the shores,” the WFP said in a report citing “chaos” in South Kivu and Tanganyika provinces.

Worst-affected are Haut-Lomami and Tanganyika provinces, which border the lake of the same name as well as neighboring Burundi, Tanzania and Zambia.
“All around Lake Tanganyika, and areas upstream of the Congo River basin, people have lost their homes, their fields and livelihoods,” the WFP reported, estimating 471,000 people were affected with 451,000 hectares (1.1 million acres) flooded, including 21,000 hectares of cropland.

“People in flooded areas need food, shelter, clean drinking water, health and sanitation support, as well as support to restart their livelihoods.
“However, WFP has very limited resources to respond to the flooding crisis due to current funding levels and the food assistance pipeline situation.”Democratic Republic of Congo (DRC).
“With towns and villages swallowed in the lakes and rivers, diseases are rife. Latrines have overflowed into the water that surrounds people’s homes and sanitation is poor.
“People are forced to wade through and wash their clothes and cooking implements in cholera-riddled water,” said the report, warning of “a whole host of animal-borne diseases.”
Locals were reporting seeing hippos, crocodiles and snakes in flooded inhabited areas, risking fatal attacks, especially on children and livestock.
Amid lost harvests, “people are struggling to feed their families which is leading to more people arriving in health care facilities with symptoms related to months of poor food intake. Especially children are at risk of developing malnutrition.”
Flooding has hit vast swathes of Africa in recent weeks, which have notably claimed 257 lives in Kenya, according to a latest toll Wednesday.