The high temperatures continue this weekend and could lead to the arrival of a fourth heat wave at the start of next week. The drought is already historic and generalized to the whole of the metropolitan territory. If 11 departments are on yellow thunderstorm vigilance this Saturday, Météo France predicts an aggravation of the dryness of the soil and further temperature increases from Sunday.
The storms, expected in the evening in the south and east of the country, will not be enough to make up for the lack of rain. Some could be “dry thunderstorms”, or heat storms, as has been the case in recent days in several regions. On Twitter, many Internet users have noticed the presence of thunderstorms in recent days… without rain.
What is a dry thunderstorm?
A dry thunderstorm is, as its name suggests, a thunderstorm that triggers thunder and lightning but generates little precipitation. It is triggered when it is very hot and dry, with little humidity. According to the Weather Channel, these storms develop in an unstable atmosphere and due to the strong dryness of the air, the precipitation developed by this storm evaporates before touching the ground.
With temperatures close to or above 30°C over a large part of France, and almost all departments subject to water restrictions, the probability of heat storms in the coming days is high.
Are they dangerous?
They can be because dry storms, if they generate little rain, retain significant electrical activity. Dry storms can thus be responsible for fires if lightning strikes arid land and easily flammable vegetation. But the majority of forest fires are man-made, not natural.
What to do in the event of a dry storm?
The instructions are the same as for classic thunderstorms. You must take shelter in a building or a vehicle, avoid staying outside and above all do not stay under trees.