Emergency workers rescued and evacuated hundreds of people in the south of France, while rapid floods suddenly turned roads and fields into rivers and lakes.
As new heavy rainfall threatened the area Wednesday, emergency services for the Gard region said rescuers after at least one person were reported missing after the flood Tuesday night.
No casualties were reported, but local authorities said the rains had caused significant damage to homes and infrastructure in towns and villages between Nimes and Montpellier.
One person was struck by lightning but survived, and the roof of a supermarket collapsed, according to local emergency services.
People evacuate from a campsite while watching the waters flow to their campers, reports BFM television. About 800 firefighters were mobilized to rescue people by helicopter and other means.
Schools across the region were closed Wednesday when cleanup work began in some towns.
The floods come after a season of extreme weather in which devastating wildfires took place near the French Riviera and around the Mediterranean, record levels in Germany and Belgium and droughts or heat waves in other areas around the world. Scientists say such events are expected, but are now happening more frequently as the planet warms due to human-caused climate change.