Smoke billows out of the fire-hit Serta mountain near Negotino, North Macedonia on July 16, 2024. (Photo: Xinhua)

A plane drops water during firefighting above the Serta mountain near Negotino, North Macedonia on July 16, 2024. (Photo: Xinhua)

Firefighters work to put out a fire in the Serta mountain near Negotino, North Macedonia on July 16, 2024. (Photo: Xinhua)

Firefighters work to put out a fire in the Serta mountain near Negotino, North Macedonia on July 16, 2024. (Photo: Xinhua)