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ENVIRONMENT

How likely are droughts and water restrictions in France in summer 2024?

Much of France has faced severe flooding this winter, but other areas already face water restrictions, and there's an extra variable in store global weather patterns play their part

Sand banks visible along the low-running Loire river in France during the drought in August 2023
The Loire river in August 2023. (Photo by GUILLAUME SOUVANT / AFP)

France’s Bureau de Recherches Géologiques et Minières (BRGM) most recent report, in early March, revealed that the water table in France was ‘satisfactory over a large part of the country’, with levels above normal for the time of year in 46 percent of the country’s underground aquifers.

It warned at the time, however, that levels were low to very low in parts of Alsace, as well as in the Saône corridor and areas of Languedoc, from the south of the Massif Central to the coast, and the Roussillon area of southwest France.

March, too, was a wet month across the bulk of France – it was the fifth wettest since records began in 1958, according to national forecaster Météo-France.

Crucially however, most of the rain falling on the ground in France now will be gobbled up by vegetation, which means that very little water will make it through to aquifers. The groundwater recharge period, when underground water tables are refilled, is now over until late autumn 2024.

Basically, the water table is about as high as it’s going to get this summer.

Which brings us back to the weather.

Long-range forecasts are notoriously inaccurate but after a mild, wet winter, forecasters expect another dry, warm summer overall, following a cooler-than-normal and occasionally wet spring.

April, for example, is set to be marked by cool spells, though, for the April-May-June quarter as a whole, temperatures are expected to remain above seasonal averages. Forecasters warn that a higher-than-usual number of Spring storms could affect the south-east of the country.

Long-range models suggest, however, that June could be hot and dry, with consequences for agriculture – though groundwater levels should be high enough to cope comfortably.

Forecasting further into the summer is even less certain than normal because – over in the Pacific – El Nino is expected to be replaced by La Nina much faster than normal, making weather prediction difficult. 

The consensus is, however, that the cooling effect of La Nina will not be felt until much later in the year. That said, it will have a more immediate effect on weather activity in the North Atlantic. Forecasters are already predicting a record-breaking hurricane season – which will have an effect on French weather patterns.

Between May and July, forecast temperatures in France are likely to remain 1C to 2C above seasonal averages. Precipitation is expected to be fairly close to average, with a tendency for thunderstorms, especially in the south.

Forecast models predict a wet end to April, a fine and dry May, a hot and occasionally thundery June, and a warmer-than-normal July punctuated by thunderstorms – though some forecasts suggest more mixed weather in the north in the seventh month.

With water tables currently well recharged, the national water situation for the summer is, right now, giving experts little cause for concern. 

Thunderstorms are expected to provide occasional watering to limit surface drought, which is always possible even if water tables are well recharged. The summer of 2024 therefore looks set to be different from recent droughts. 

However, this is not to say water restrictions are not impossible, or even unlikely. In certain areas, notably the Aude and Pyrénées-Orientales, where rainfall has been well below average for years, the situation is already serious.

While the rest of the country saw high rainfall in March, these two départements were recording 50 percent less rain than normal.

These areas are already facing a range of water restrictions. To find out whether restrictions are in place where you live, consult the Vigieau website, which offers information on a national, regional and local level.

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PARIS

Huge new River Seine stormwater facility opens ahead of Paris Olympics

It has no spire, stained glass windows or nave but the cavernous underground stormwater facility inaugurated on Thursday in the French capital ahead of the Paris Olympics has been compared to Notre-Dame Cathedral.

Huge new River Seine stormwater facility opens ahead of Paris Olympics

The giant new structure, burrowed 30 metres under the ground next to a train station, is a key part of efforts to clean up the River Seine, which is set to host swimming events during the Paris Games in July and August.

“It’s a real cathedral. It’s something exceptional,” Paris Mayor Anne Hidalgo said on Thursday as she walked on the bottom of the vast cylinder-shaped construction that has taken more than three years to complete.

Deputy Paris mayor Antoine Guillou has compared the project in western Paris, near the Austerlitz transport hub, to Notre-Dame, which is under reconstruction after a devastating fire in 2019.

“I like to say that we’re building two cathedrals,” he told reporters during a visit in mid-March.

“There’s the one above ground that everyone knows – Notre-Dame. And then there’s the one underground.”

Notre-Dame will not be ready in time for the Paris Games, as promised by President Emmanuel Macron immediately after the inferno that tore through the 850-year-old masterpiece.

But its spire has been restored and workers are busy working on the roof ahead of its grand re-opening in December.

Fortunately for Olympic open-water swimmers, the stormwater facility is set to enter service in June after tests later this month.

Its role will be to store rainwater in the event of a heavy downpour, reducing the chances of the capital’s sewerage system needing to discharge its pathogen-rich contents directly into the Seine.

Paris’ sanitation system is under immense scrutiny following pledges from Olympic organisers to use the Seine for the marathon swimming and triathlon during the Games, which begin on July 26th.

Cleaning up the river has also been promoted as one the key legacy achievements of Paris 2024, with Hidalgo intending to create three public bathing areas in its waters next year.

One of the features of the sanitation system – which dates from the mid 19th century – is that it collects sewage, domestic waste water and rain water in the same underground tunnels before directing them to treatment plants.

In the event of a major rainstorm, the system becomes overwhelmed, which leads to valves being opened that release excess water containing untreated sewage directly into the Seine.

In the 1990s, this led to around 20 million cubic metres of dirty water containing sewage being discharged every year, according to figures from the mayor’s office.

In recent years, after a multi-decade investment and modernisation programme, the figure has fallen to around 2.0 million m3.

On average, discharges occur around 12 times a year at present.

But with the new facility this number should fall to around two, city officials say.

A major storm or a succession of heavy rains could still lead to the cancellation of the Olympic swimming events.

But chief organiser Tony Estanguet stressed on Thursday that there were contingency plans in place, including being able to delay the races by several days if necessary.

“With all the measures that have been put in place and the planning, we are very confident that the competitions will take place,” he told reporters while he inspected the stormwater facility.

Three Olympic test events had to be cancelled last July and August following heavy rain.

Some swimmers, including Olympic champion Ana Marcela Cunha from Brazil, have called for a Plan B in case the Seine is too dirty.

Olympic open water swimming has frequently been plagued by pollution concerns.

At the end of the test event in 2019 ahead of the Tokyo Olympics, swimmers protested against the quality of the water in Tokyo Bay.

At the Rio Olympics in 2016, the prospect of swimming in the polluted Guanabara Bay also made headlines.

Hidalgo and President Emmanuel Macron have promised to take a dip in the Seine before the Paris Games to demonstrate it is safe – just over a century since public swimming was banned there in 1923.

Hidalgo said this would happen in June.

“We’ll give you the date. We’re going to set a time range to do it because in June you can have good weather but there can also be storms,” she said.

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