A man walks under water atomizers during a heatwave, at the Bassin de la Villette in Paris, on July 24, 2019. Parisians were bracing for potentially the hottest ever temperature in the French capital this week as a new heatwave blasted into northern Europe that could set records in several countries. / AFP / Dominique FAGET

A girl cools down under the spray of water during a hot and sunny day at the Wenceslas Square on July 24, 2019 in Prague. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. / AFP / Michal CIZEK

People take a sunbath as in background can be seen facilities of a North Sea container port on July 24, 2019 in Wremen, northwestern Germany, where temperatures reached 34 degrees Celsius. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. / AFP / PATRIK STOLLARZ

Two men cool off in a public fountain near the Atomium during a summer hot day in Brussels, Wednesday, July 24, 2019. Europeans are jumping into public fountains and the sea to keep cool as parts of Europe could see a record-breaking heat wave. (AP Photo/Francisco Seco)

People cool off at the Trocadero Fountains next to the Eiffel Tower in Paris, on July 23, 2019 as a new heatwave hits Europe. France and western Europe were bracing for a new record-breaking heatwave that is forcing the temporary shutdown of a French nuclear power station and will test competitors in the legendary Tour de France cycle race. Forecasters predicted new temperatures highs in a string of countries, including Belgium, Luxembourg and the Netherlands, where the mercury is set to reach 40 degrees Celsius (104 Fahrenheit) for the first time on July 23, 2019. / AFP / BERTRAND GUAY

A girl with an umbrella stands under water sprinklers during a heat wave in Vienna, Austria July 23, 2019. REUTERS/Lisi Niesner

A toddler and his father walk past a fountain as a sightseeing bus drives by in Berlin on July 23, 2019. According to the German Weather Service (DWD), day-time temperatures across most of the country are already expected to reach well above 30 degrees on July 23, 2019, with a heatwave expected to last the rest of the week. / AFP / John MACDOUGALL

A child plays at the dancing fountains of the Andre Citroen park in Paris on July 23, 2019. Parisians were bracing for potentially the hottest ever temperature in the French capital this week as a new heatwave blasted into northern Europe that could set records in several countries. / AFP / Philippe LOPEZ

A child runs under water sprinklers during a heat wave in Vienna, Austria July 23, 2019. REUTERS/Lisi Niesner

People cool off in the fountains at Toldbod Plads in Aalborg, Denmark, on July 24, 2019. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. - Denmark OUT / AFP / Ritzau Scanpix / Henning Bagger

A man cools off in a fountain in Rome, Wednesday, July 24, 2019. Europeans are jumping into public fountains and the sea to keep cool as parts of Europe could see a record-breaking heat wave. (Riccardo Antimiani/ANSA via AP)

People take a sunbath as a cargo ship makes its way on the North Sea on July 24, 2019 in Wremen, northwestern Germany, where temperatures reached 34 degrees Celsius. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. / AFP / PATRIK STOLLARZ

A man cools off under water sprinklers during a heat wave in Vienna, Austria July 23, 2019. REUTERS/Lisi Niesner

A man rides an electric scooter under water sprinklers during a heat wave in Vienna, Austria July 23, 2019. REUTERS/Lisi Niesner

People cool off in a fountain in front of the chancellery in Berlin on July 23, 2019. According to the German Weather Service (DWD), day-time temperatures across most of the country are already expected to reach well above 30 degrees on July 23, 2019, with a heatwave expected to last the rest of the week. / AFP / John MACDOUGALL

Police uses a water cannon to irrigate roadside trees on July 24, 2019 in Wuppertal, western Germany, where temperatures reached 35 degrees Celsius. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. - Germany OUT / AFP / dpa / Claudia Otte

People cool off in the fountains at Toldbod Plads in Aalborg, Denmark, on July 24, 2019. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. - Denmark OUT / AFP / Ritzau Scanpix / Henning Bagger

People cool off in the fountains at Toldbod Plads in Aalborg, Denmark, on July 24, 2019. Weather forecasters predict new temperature highs across western Europe hit by another heatwave setting new temperature records. - Denmark OUT / AFP / Ritzau Scanpix / Henning Bagger

Tourists cool off in a public fountain near the Atomium during a summer hot day in Brussels, Wednesday, July 24, 2019. Europeans are jumping into public fountains and the sea to keep cool as parts of Europe could see a record-breaking heat wave. (AP Photo/Francisco Seco)

Children play at the dancing fountains of the Andre Citroen park in Paris on July 23, 2019. Parisians were bracing for potentially the hottest ever temperature in the French capital this week as a new heatwave blasted into northern Europe that could set records in several countries. / AFP / Philippe LOPEZ