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WEATHER

Why have the floods in Europe been so deadly?

Devastating floods in Germany and other parts of western Europe have been described as a "catastrophe", a "war zone" and "unprecedented".

Why have the floods in Europe been so deadly?
The town of Ahrweiler on Saturday. Photo: picture alliance/dpa | Thomas Frey

With more than 160 people dead across Europe and the toll still climbing, many are asking: How did this happen and why has it been so bad?

Exceptional weather

“Masses of air loaded with water had been blocked at high altitude by cold temperatures, which made them stagnate for four days over the region,” Jean Jouzel, a climatologist and former vice-president of the Intergovernmental Panel on Climate Change (IPCC), told AFP.

Between 100 and 150 millimetres (four and six inches) of rain fell between July 14 and 15, according to the German weather service – an amount that would normally be seen over two months.

Europe has been hit repeatedly by severe flooding before, but this week has been “exceptional in terms of both the amount of water and the violence” with which it was dumped, according to German hydrologist Kai Schröter.

READ ALSO: More than 140 dead in German flood disaster 

Global warming?

Many European politicians have squarely blamed global warming for the disaster, while Germany’s far-right AfD has accused them of “instrumentalising” the floods to promote a climate-protection agenda.

“We cannot yet say with certainty that this event is linked to global warming,” Schröter told AFP, but “global warming makes events like this more likely”.

In technical terms, climate change means the earth is becoming warmer so more water is evaporating, which “leads to larger water masses in the atmosphere”, increasing the risk of intense rainfall, he said.

The IPCC has also said global warming boosts the likelihood of extreme weather events.

READ ALSO: How the extreme flooding in Germany is linked to global warming

Small rivers overwhelmed

The worst-hit areas have been those near small rivers or tributaries without flood defences that have quickly become overwhelmed by the volume of rain and burst their banks.

“The Rhine is used to floods” and cities along it have built protections, unlike the towns and villages along the region’s smaller rivers, Armin Laschet, head of the hard-hit North Rhine-Westphalia region, said.

“When rivers are slower and wider, the water rises less quickly and there is more time to prepare,” said hydrologist Schröter.

Lack of awareness

Local authorities have come under fire in Germany for not evacuating people soon enough.

“Forecasters… issued warnings, yet the warnings were not taken seriously and preparations were inadequate,” said Hannah Cloke, a professor of hydrology at the UK’s University of Reading.

Some residents were also simply unaware of the risks of such violent flooding, with dozens found dead in their cellars.

“Some victims underestimated the danger and did not follow two basic rules during heavy rainfall. Firstly, avoid basements where water penetrates.

Secondly, switch off the electricity immediately,” Armin Schuster, chairman of the BBK, a state agency specialising in natural disasters, told the Bild daily.

READ ALSO: Why have so many died in the German floods?

Urban planning

Some experts have pointed to the dangers of poor urban planning and the increasing amount of concrete at the heart of a heavily industrialised, densely populated region of Europe.

The affected regions had already seen unusually high rainfall in recent weeks, meaning the soil was saturated and unable to absorb the excess water.

When the ground is covered with man-made materials like concrete, the soil is less able to absorb water, increasing the risk of flooding.

“Urbanisation… has played a role. Would the toll have been as high 40 years ago?” Jouzel asked.

By Florian CAZERES

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WILDFIRES

Europe facing record year for wildfire destruction: EU

Europe's blistering summer may not be over yet, but 2022 is already breaking records, with nearly 660,000 hectares ravaged since January, according to the EU's satellite monitoring service.

Europe facing record year for wildfire destruction: EU

And while countries on the Mediterranean have normally been the main seats of fires in Europe, this year, other countries are also suffering heavily.

Fires this year have forced people to flee their homes, destroyed buildings and burned forests in EU countries, including Austria, Croatia, France, Greece, Italy, Portugal and Spain.

Some 659,541 hectares (1.6 million acres) have been destroyed so far, data from the European Forest Fire Information System (EFFIS) showed, setting a record at this point in the year since data collection began in 2006.

Europe has suffered a series of heatwaves, forest fires and historic drought that experts say are being driven by human-induced climate change.

They warn more frequent and longer heatwaves are on the way.

The worst-affected country has been Spain, where fire has destroyed 244,924 hectares, according to EFFIS data.

The EFFIS uses satellite data from the EU’s Copernicus Atmosphere Monitoring Service (CAMS).

READ ALSO: EXPLAINED: How the climate crisis is hitting Europe hard

The data comes after CAMS said Friday that 2022 was a record year for wildfire activity in southwestern Europe and warned that a large proportion of western Europe was now in “extreme fire danger”.

“2022 is already a record year, just below 2017,” EFFIS coordinator Jesus San-Miguel said. In 2017, 420,913 hectares had burned by August 13, rising to 988,087 hectares by the end of the year.

“The situation in terms of drought and extremely high temperatures has affected all of Europe this year and the overall situation in the region is worrying, while we are still in the middle of the fire season,” he said.

Since 2010, there had been a trend towards more fires in central and northern Europe, with fires in countries that “normally do not experience fires in their territory”, he added.

“The overall fire season in the EU is really driven mainly by countries in the Mediterranean region, except in years like this one, in which fires also happen in central and northern regions,” he added.

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