After the heat, the thunderstorms. Météo-France has placed 13 departments in vigilance orange for storm phenomena, which should start at the end of the morning. Are concerned : the Calvados, Côtes-d'armor, Brittany, Indre-et-Loire, Loire-Atlantique, Ille-et-Vilaine, Maine-et-Loire, Manche, Mayenne, Morbihan, Orne, Sarthe and the Vendée (85). The episode will be brief (1 or 2 hours) but intense with hail, heavy rains, electrical activity the notable and gusts may locally exceed 100 km/h.
In the early evening, the thunder will be more numerous over a quarter of south-west. The showers can be sustained. In the North-East, small thundershowers will occur in the day. They will strengthen in the evening. In the South-East, the low clouds present in the gulf of Lion in the morning will dissipate over the hours. The weather will remain dry with a sky variable of Provence in the Rhone-Alpes. The showers accompanied by thunder will develop over the Alps and the Massif central.
End of the heat wave Thursday
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The maximum reach of 21 to 28 degrees in Brittany and along the atlantic coast, 30 to 34 degrees of Normandy to the south-west and along the Mediterranean, up to 33 or 36 degrees of the Provence to the Hauts-de-France, passing through the North-East. The end of the heat wave is expected, according to Météo-France, Thursday, to 21 hours.