Bat skulls are pictured in a display case inside the Grant Museum of Zoology, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

The skeleton of an aardvark is pictured in a display case inside the Grant Museum of Zoology, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

Display cases of artefacts are pictured inside the Grant Museum of Zoology, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

Display cases of artefacts are pictured inside the Grant Museum of Zoology, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

An employee points to a computer monitor display showing the temperatures inside the display cases as they monitor the heat during the heatwave, at the Grant Museum of Zoology, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

Tannis Davidson, Head of Zoology and Science collections at the Grant Museum of Zoology in London, holds a device displaying the temperature inside the display cases in the museum, in central London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

A fan blows air inside the the Grant Museum of Zoology, in London on June 26, 2026. where they are having to monitor the temperatures inside the display cases, during the heatwave. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE

(FILES) French-Malian singer Aya Nakamura performs on stage during the 35th edition of the Francofolies Music Festival in La Rochelle, southwestern France, on July 12, 2019. Despite the new heatwave sweeping across France, a host of major artists are sure to raise the temperature even further for the 150,000 attendees of the 42nd edition of the Francofolies. Aya Nakamura, Orelsan, Mika or the band Feu ! Chatterton, among others, will be performing in La Rochelle from July 10 to 14, 2026. Against a backdrop of intense summer heat, no major changes are on the agenda for the festival organizers, who remain in close contact with local authorities. (Photo by XAVIER LEOTY / AFP via Getty Images)