HEAT AUGUST 2022. 26 French departments are still on heat wave orange vigilance, while the peak of heat is expected this Wednesday, August 2.
[Mis à jour le 03 août 2022 à 09h44] The third heat wave of the summer is expected to peak on Wednesday August 3. While 26 departments are still placed in heat wave orange vigilance by Météo France, up to 40 degrees are expected today in certain regions, in particular the South-West. “A peak will be reached on a national scale, but of less intensity than during the recent episodes of last June and July”, specifies Météo France.
“Thursday, the strong heat persists from the South-West to the North-East. On Friday, they are in regression and are confined around the valleys of the Rhône and the Saône”, is it added in the same bulletin. In addition to the 26 departments in orange vigilance during the heat wave, 42 others are still placed in yellow by Météo France.
In detail, the departments in orange vigilance during the heat wave are: Bas-Rhin, Haut-Rhin, Territoire de Belfort, Haute-Saône, Doubs, Côte d’Or, Jura, Saône-et -Loire, Ain, Haute-Savoie, Loire, Puy-de-Dôme, Rhône, Isère, Savoie, Drôme, Vaucluse, Gard, Ardèche, Haute-Loire, Corrèze, Lot, Lot-et-Garonne, Tarn-et-Garonne, Tarn and Haute-Garonne.
As a reminder, we speak of a heat wave when these four characteristics are combined:
- A period of high heat;
- With temperatures 5 degrees higher than normal for the season;
- The day and the night ;
- For 3 consecutive days.
When will this new heat wave last? Where ? What are the forecasters predicting for the days and weeks to come? What are the steps to take to protect yourself from the heat and cool your home?
Towards a new heat wave in early August? Map and forecast for next week
While the temperatures have finally dropped, La Chaîne Météo announces a further rise in temperatures since this weekend in a large part of France. Only the north, the northwest and the Atlantic coast should be spared by this new wave of strong heat.
What are the temperatures expected in France in the coming days?
Temperatures are rising (almost) everywhere in France, in this first week of August. Expect to be hot. Here are the forecasts for Meteo France :
- Paris : the capital will also experience a new heat wave with a peak of 36°C expected this Wednesday, the hottest day of the week.
- Aix en Provence : this Wednesday, the day will be hot with a thermometer displaying up to 36 degrees, just like Thursday and Friday. 39°C are expected on Saturday and 35°C on Sunday.
- Albi : it will be (very) hot in Albi this week with 38 degrees this Wednesday, then 39°C on Thursday. 36°C are announced on Friday by Météo France, then the thermometer will rise to 37°C on Saturday and 36°C on Sunday with the risk of thunderstorms.
- Carpentras : the temperatures expected this week in Carpentras are also very hot with 37°C on Wednesday, Thursday and 38°C on Friday, just like Saturday and 36°C on Sunday with the risk of thunderstorms.
- Lyons: temperatures are rising in Lyon with 38°C expected this Wednesday and 39°C Thursday and 38°C Friday. The thermometer goes down (a little) on Saturday with 34°C, and 33°C on Sunday.
- Grenoble : plan to be hot also in Grenoble with 37°C expected this Wednesday, just like Thursday, then 37°C Friday, 34°C Saturday and 33°C Sunday with risk of thunderstorms.
- Marseilles: The temperatures announced this week in Marseille will be relatively “less hot” than elsewhere, between 31 and 35 degrees.
- Toulouse: temperatures rise with 39°C on Wednesday and 37°C on Thursday for the hottest days of the week, then 34°C on Friday, 35°C on Saturday and 34°C on Sunday with the risk of thunderstorms.
Heat wave 2022: after two heat waves (June and July), a very hot month of August in sight?
France is going through a third heat wave in less than two months! The beginning of August promises to be scorching, especially in the south-east of the country. Here’s what forecasters predict The Weather Channel until mid-August:
- Week from August 1 to 7: a risk of a new heat wave which is confirmed for 3/4 of France. From Monday August 1, a rise in hot air between the Pyrenees and the Alps gradually sets in, causing temperatures to rise, with a peak expected on Thursday August 4. Temperatures around 35 degrees are expected with possible peaks at 40 degrees.
- Week of August 8 to 14: after high temperatures, the mercury will drop. A summer week is expected throughout France with sunshine and pleasant temperatures. If the temperatures could be a little lower, they will still remain above normal for the season.
- Week of August 15 to 21: The south could experience more unstable weather. The north should continue to benefit from high pressure conditions and sunshine.
What are the recommendations to follow during the heat wave?
Heat wave, heat peak, heat wave and heat dome: what are the differences?
Heat wave and heat wave are two different things. To speak of a heat wave, the temperatures must be 5 degrees higher than normal for the season, day and night, and this for at least 3 days and 3 nights. The heat wave temperature threshold therefore differs according to the departments and regions. Heat waves most often occur in France in July and August. We must be vigilant from the month of June. High temperatures, even above seasonal norms, do not necessarily mean a heat wave. Most often, these are heat waves.
The term heat peak is more to be used during a sudden rise in temperature, whereas a heat wave corresponds to a longer episode. Météo France judges that a heat wave is in progress when temperatures above the monthly average are detected by more than three degrees Celsius, for at least three days.
Last term often mentioned these days when talking about these scorching temperatures, that of a heat dome. A heat dome settled over almost the entire country this May 2022. This meteorological phenomenon is explained by a large mass of hot air from Morocco and Spain, trapped by atmospheric pressure. This usually occurs in summer, but also in spring. This results in scorching heat.
You should know that Météo-France provides several levels of heat wave vigilance: level 1 (green) corresponds to a “seasonal watch”, level 2 (yellow) to a “heat warning” and it is level 3 (orange) which corresponds to the “heat wave alert”. Finally level 4 (red), the highest, determines “maximum mobilization”. In summer, it is not uncommon for several departments to be placed on orange or red alert for the heat wave.
Heat wave: what are the temperature records recorded in recent years?
If the heat wave of the summer of 2003 remains in everyone’s memory (and that of 1976 also among the old), France has since experienced other episodes of very hot weather. The summer of 2019 had broken several records with absolute temperature records reached in several cities. According to data from Météo-France, 50 cities had thus recorded a new record since July 25, 2019. While the summer of 2019 had been very hot, some records were broken during this heat wave in mid-June 2022.
A look back at the first heat wave of summer 2022 and the heat wave day of Saturday June 18, 2022: 150 municipalities broke a heat record according to meteorologist Patrick Marlière, interviewed by BFM TV: “We went from 70 cities with monthly records beaten, more than 150 today in France, from the Pyrenees to the Belgian border”. The city of Nantes thus broke its record for the month of June with 39.1°C. In the South-West, records at more than 40 degrees have been reached: Biarritz with 42.9°, Saint-Jean-de-Luz with 42° or Bordeaux with 40°.
The July 2022 heat wave also set temperature records on Monday, July 18. Among the 63 records recorded that day, the majority are in the north, west or southwest. We can cite :
- Beaulieu-sur-Layon (49): 42.7°C
- Biscarrosse (40): 42.6°C
- Nantes (44): 42°C
- La Roche-sur-Yon (85): 41.5°C
- Cholet (49): 41.3°C
- Niort (79): 41°C
- Rennes (35): 40.5°C
- Caen (14): 40.1°C
- Dinard (35): 40°C
- Saint-Brieuc (22): 39.7°C
- Noirmoutier (85): 38.7°C
- Lorient (56): 37.6°C
- Brest (29): 39.3
- The island of Yeu (85): 35.9°C