One of the main consequences of global warming is rising sea levels. For many of us, this may seem abstract and far from our concerns. The ocean of course has natural fluctuations, and some years are less aggravating than others.
On average, on our French coasts, the sea level has risen 9 centimeters since 1993. This already seems enormous in just 30 years, but the forecasts are even more alarming: the level will rise by another 16 centimeters between 2020 and 2050, according to forecasts IPCCIPCCwith a probability of reaching 22 centimeters.
The phenomenon will get even worse after 2050, but its rate of increase will be conditioned by the quantity of greenhouse gases that we emit at the moment. By 2100, it is not impossible that sea level rise will exceed 1 meter in France, according to the latest IPCC report.
One in ten coastal homes threatened in the future
According to a study by the firm Callendar – Climate IntelligenceIntelligenceunder the most pessimistic (but likely) global warming scenario, nearly one in ten coastal properties could become floodable in 2100! The areas most affected by this phenomenon are the mouth of the Seine, the Atlantic coast and then the Mediterranean coast. Among the large cities most at risk between 2020 and 2050, we find first of all Le Havre, the most threatened large city, then Caen, Bordeaux, Arcachon, Deauville, Bayonne, Toulon and even Sète.
