Israel’s bombing of Iran’s oil infrastructure will have major long-term environmental repercussions, experts have warned, as monitors admitted they were struggling to keep track of the environmental disasters arising from the widening war.

Even as Iranians filled the streets to mark the appointment of a new supreme leader, the Shahran oil depot north-east of Tehran and the Shahr-e fuel depot to its south continued to burn on Monday, two days after they were bombed by Israeli warplanes.

In the immediate aftermath of the attacks, Iran’s environmental agency and the Iranian Red Crescent Society had warned Tehran residents to stay at home, warning the toxic chemicals spread by airstrikes on five fossil fuel installations around the city could lead to acid rain and damage the skin and lungs.

On Monday, the head of the World Health Organization, Tedros Adhanom Ghebreyesus, said: “Damage to petroleum facilities in Iran risks contaminating food, water and air – hazards that can have severe health impacts especially on children, older people, and people with pre-existing medical conditions.”