Hundreds of people had to be evacuated in the south of France after flash floods turned roads and fields into rivers and lakes.
No casualties were reported following the showers in the Gard.
But local authorities said the flooding caused significant damage to homes and infrastructure in towns and villages between Nimes and Montpellier.
As further heavy rains threatened the region on Wednesday, Gard relief workers said rescuers were looking for at least one missing person on Tuesday evening.
One person was struck by lightning but survived, and the roof of a supermarket collapsed with the pounding water, according to the regional emergency service.
Evacuees from a campground described on BFM television that they saw the waters rise towards their campers. About 800 firefighters were mobilized to rescue people by helicopter and other means.
Schools in the area were closed on Wednesday as clean-up work began in some towns.
The flooding comes after a season of extreme weather conditions that has seen devastating forest fires near the French Riviera and around the Mediterranean, record flooding in Germany and Belgium, and droughts or heat waves in other parts of the world. Scientists say such events are expected but are occurring more frequently now that the planet is warming due to man-made climate change.