A view shows the ground of the Rialb reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Bassella, Spain May 5, 2023. REUTERS/Nacho Doce

A pedal boat sits on a cracked ground at a reservoir, as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, near Vic, Spain May 6, 2023. REUTERS/Nacho Doce

Farmers collect the hay harvest in a field affected by the prolonged drought, in Ronda, southern Spain May 11, 2023. REUTERS/Jon Nazca

A man walks under the strong sun during scorching summer temperatures in spring in Toledo, Spain April 28, 2023. REUTERS/Isabel Infantes

Workers catch fish using voltage electricity to transfer the native species to another location due to the low water level of the River Onyar, in Girona, Spain, April 26, 2023. REUTERS/Albert Gea

Pensioner Antonio Sanchez, 78, works on his field, as the supply of drinking water has fallen to its lowest level since 1990 due to extreme drought, in the village of Bassella, Spain May 5, 2023. REUTERS/Nacho Doce

A view of Sierra Boyera Reservoir at 0.01% of its capacity, in Belmez, southern Spain April 26, 2023. REUTERS/Guillermo Martinez

A view shows swimming pools adjacent to houses, as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in Vacarisses, Spain May 4, 2023. REUTERS/Nacho Doce

A view shows the cracked ground of the Baells reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Cercs, in the region Bergueda, Spain May 5, 2023. REUTERS/Nacho Doce

A view shows the cracked ground of the Baells reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Cercs, in the region Bergueda, Spain May 6, 2023. REUTERS/Nacho Doce

A view shows the cracked ground of the Llosas del Cavall reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Sant Llorenc de Morunys, Spain May 4, 2023. REUTERS/Nacho Doce

A view shows the cracked ground of the Llosas del Cavall reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Sant Llorenc de Morunys, Spain May 5, 2023. REUTERS/Nacho Doce

A view shows the ground of the Rialb reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Bassella, Spain May 6, 2023. REUTERS/Nacho Doce

A vegetable patch is affected by the prolonged drought, in Ronda, southern Spain May 11, 2023. REUTERS/Jon Nazca

A view shows the cracked ground of the Llosas del Cavall reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, in the village of Sant Llorenc de Morunys, Spain May 4, 2023. REUTERS/Nacho Doce

Dogs cool off in a drinking trough during scorching summer temperatures in spring in Ronda, Spain April 27, 2023. REUTERS/Jon Nazca

A canoe is pictured on the cracked ground at a reservoir as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, near Vic, Spain May 6, 2023. REUTERS/Nacho Doce

A pedal boat sits on a cracked ground at a reservoir, as drinking water supplies have plunged to their lowest level since 1990 due to extreme drought, near Vic, Spain May 6, 2023. REUTERS/Nacho Doce

A view of Sierra Boyera Reservoir at 0.01% capacity, in Belmez, southern Spain April 26, 2023. REUTERS/ Guillermo Martinez

A tourist rests on the grass of a park under the sun during unusually high temperatures in Ronda, Spain April 25, 2023. REUTERS/Jon Nazca