France: Heatwave forecast to persist over much of the country through at least Aug. 25 /update 2

Event

Forecast models indicate high temperatures will persist across much of France through at least Aug. 25. Nyons in Drome Department recorded its highest ever temperature of 42.4 C (108.3 F) Aug. 21, and other temperature records were broken in several locations across southern and southeastern France. Record nighttime minimum temperatures of as high as 29 C (84 F) have also been recorded in parts of southern France. High temperatures are forecast to persist over much of France Aug. 22-24, especially in the southern half of the country. Temperatures of up to 42 C (108 F) are possible in southeastern regions Aug. 22, southern and southeastern regions Aug. 23, and southwestern regions Aug. 24. Widespread temperatures of 34-40 C (93-104 F) are expected across the southern half of France in the coming days. Temperatures of 30-35 C (86-95 F) are expected across much of the northern half of the country, with cooler conditions possible along the north coast. Temperatures are expected to drop across much of the country from Aug. 25; however, the heat may linger in southern and southeastern regions.

As of Aug. 22, Meteo France has issued the following heatwave warnings across the country:

• Red heatwave warnings (the highest level on a three-tier scale): Ardeche, Drome, Haute-Loire. and Rhone departments in Auvergne-Rhone-Alpes Region.

• Orange heatwave warnings: Across the rest of Auvergne-Rhone-Alpes Region not under red warnings; across Bourgogne-Franche-Comte Region with the exception of Yonne Department; Cher and Indre departments in Centre-Val de Loire Region; northern Corsica; Bas Rhin and Haut-Rhin departments in Grand Est Region; across Nouvelle-Aquitaine Region with the exception of Creuse and Pyrenees-Atlantiques departments; across Occitanie Region with the exception of Hautes-Pyrenees Department; Vendee Department in Pays de la Loire Region; and across Provence-Alpes-Cote d'Azur Region.

• Yellow heatwave warnings: Yonne Department in Bourgogne-Franche-Comte Region; Indre-et Loire, Loire-et-Cher, and Loiret departments in Centre-Val de Loire Region; southern Corisca; Aube, Haute-Marne, and Vosges departments in Grand Est Region; Creuse and Pyrenees-Atlantiques departments in Nouvelle-Aquitaine Region; Hautes-Pyrenees Department in Occitanie Region; and Loire-Atlantique and Maine-et-Loire departments in Pays de la Loire Region.

Officials could update and possibly extend the coverage of weather alerts over the coming days.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for additional wildfire growth throughout the region. Heatwaves also pose a threat to vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers being hospitalized for dehydration.

Transport and Utilities
Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speeds. Road surface damage is also possible, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur, as very high temperatures put more stress on vehicles, making tire blowouts more common. Major flight disruptions are unlikely at regional airports, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.

Advice

Monitor local media for weather updates and related advisories. During heatwaves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well-hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating; drink water that is bottled or has been boiled. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in case prolonged electricity outages occur.

Resources

Meteo France