In France, the authorities warn of heat waves and urge the elderly to stick to air conditioning. Belgium and Germany can also have similar weather.
On the Italian side of the Mont Blanc massif in the Alps, the glacier may be about to collapse. 500,000 cubic meters of ice risk sweeping down into the valley at the resort of Courmayeur.
Many residents and tourists have chosen to leave the area.
- We camped and decided to go somewhere else. We are most worried that they will close the road, says a tourist.