In one satellite image, of Khan Younis in the south of Gaza, two damaged large water storage tanks can be seen.

The destruction of water and sanitation facilities has led to “disastrous health consequences for the population”, said Dr Natalie Roberts, executive director of Medecins Sans Frontieres UK.

“The rates of diarrhoeal disease have gone catastrophically high,” she said.

In very severe cases, such disease can kill young children and the vulnerable. Rates of hepatitis A – found in contaminated water and particularly dangerous for pregnant women – are also high, according to the charity.

“This is killing people,” Dr Roberts said.

There is a particular spike in disease in Rafah in the south where many Gazans have fled to, Dr Roberts said, and a risk of cholera.

There has been widespread damage to buildings across Gaza since Hamas attacked Israel on 7 October. According to the UN, about 69,000 housing units have been destroyed and a further 290,000 damaged.

Homes are now “very unlikely” to have running water, according to aid workers we spoke to.