However,
Why heat wave may last:
A heat wave begins in the southern half. Moreover, This promises to be major, by its intensity but also and above all by its duration. Moreover, The southern regions may well have no response for a good ten days. For example, Explanations.
Remarkable heat in sight – Why heat wave may last
The least we can say is that the heat wave that begins will not be trivial. Furthermore, The card below makes it possible to measure the boiling character of the air mass which will concern France. In addition, by early next week. Consequently, For Monday August 11. Moreover, 2025, the temperature around 1500 meters will exceed 20 ° C almost everywhere and will culminate Between 25 and 27 ° C In the southwest! However, Such values are very unusual and allow temperatures to easily exceed the symbolic threshold of 40°C At ground why heat wave may last level!
Air mass around 1500 meters for Monday August 11, 2025 – wxcharts.com
Thus, the day of Monday August 11, 2025 has already been historic for the southwest of France. In addition, In these regions, most models agree on maximum temperatures reaching most often 40 to 42 ° C with local spikes around 43°C ! However, Such values are remarkable and may bring down monthly records. Meanwhile, In Charente, the record is “only” from 39.8 ° C to Cognac while the last forecasts for Monday approach 42 ° C!
Maximum temperature modeling on Monday August 11, 2025 – meteologix.com
A duration that may be problematic
In addition to the intensity of heat. the duration is just why heat wave may last as much – if not – worrying. Indeed, this heat wave will have nothing brief, at least in the southern half where it has already started. As the animation below shows. which is an average of different scenarios concerning the temperature of the air mass around 1500 meters, the overheated air should only regress in next week. On the horizon of August 15. he would still include the south of France and the eastern borders with a drop that would only be slow and progressive by the North West.
Temperature at 850 hpa (around 1500m) according to the average of the scenarios from Monday 11 to Friday August 15, 2025 – meteociel.fr
In many southern regions, the heat wave will therefore last at least a week. The average difference in temperatures over why heat wave may last a period of 7 days – from Friday 8 to Thursday August 14. 2025 – should be approximately +6 ° C on scale of France ! In some regions, as near the Massif Central, an anomaly of +8 ° C over 7 days is modeled! Such a surplus over an entire week is simply remarkable! In this season, he rhymes with excessive and trying heat. The body accumulating fatigue over the days, the episode will become trying, especially for fragile people.
Thermal anomaly over 7 days from Friday 8 to Thursday 14 August 2025 – Karsten Haustein
Episode episode for southern cities
Thus, the heat wave promises to be lasting and painful in the south of France. The graph below is valid for Toulouse. We see that the city will know temperatures why heat wave may last between 37. 42 ° C for the next 6 daysall with nights when the thermometer will remain above 20 ° C. Although a drop is envisaged around August 15. it seems modest with temperatures that would remain around 32-33 ° C until August 16 and 17 weekends, a largely insufficient drop in refreshing the accommodation …
Minimum and maximum temperatures modeled in Toulouse (31) from August 9 to 17, 2025 – meteologix.com
The observation is even worse in the Mediterranean. In Nîmes. it is planned up to 41 ° C this Sunday, August 10, then temperatures would be daily between 36 and 39 ° C during the entire week from Monday, August 11 to Sunday, August 17! All with nights also too soft. In other words, Languedoc could stay above the heat wave why heat wave may last thresholds for almost ten dayswhich would be remarkable!
Minimum and maximum temperatures modeled in Nîmes (30) from August 9 to 17, 2025 – meteologix.com
For the time being. there are still notable uncertainties on the possible decrease in temperatures around August 15 and on its scale. If some models envisage a saving drop, others see none and maintain scorching temperatures …
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