France: Heatwave forecast to persist over much of the country through at least Aug. 23 /update 1

Event

Forecast models indicate that high temperatures will persist across much of France through at least Aug. 23. High temperatures have been affecting Auvergne-Rhone-Alpes Region and surrounding areas in recent days, and the heat is forecast to expand gradually across the country over the coming days. The peak of the heatwave is expected around Aug. 20-22, when maximum temperatures could reach around 40 C (104 F) in southeastern regions and around 35 C (95 F) around Paris.

As of Aug. 18, Meteo France has issued the following heatwave warnings across the country:

• Orange heatwave warnings (the middle tier on a three-tier scale): Ain, Allier, Cantal, Haute-Loire, Haute-Savoie, Isere, Loire, Pu-de-Dome, Rhone, and Savoie departments in Auvergne-Rhone-Alpes Region; Doubs, Jura, and Saone-et-Loire departments in Bourgogne-Franche-Comte Region; Corrieze and Lot-et-Garonne departments in Nouvelle-Aquitaine Region; and Gers, Lot, Tarn, and Tarn-et-Garonne departments in Occitanie Region.

• Yellow heatwave warnings: Ardeche and Drome departments in Auvergne-Rhone-Alpes Region; Cote-d'Or. Haue-Saone, Nievre, and Territoire de Belfort departments in Bourgogne-Franche-Comte Region; Cher Department in Centre-Val de Loire Region; Bas Rhin and Haut-Rhin departments in Grand Est Region; Dordogne and Landes departments in Nouvelle-Aquitaine Region; Ariege, Aveyron, Haute-Garonne, and Lozere departments in Occitanie Region; and across Provence-Alpes-Cote d'Azur 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