On 14 November 2023, Palestinian journalist Bisan Owda declared the start of winter in Gaza as sheets of rain flooded the streets. A month later, Owda told her followers that “we’re drowning” in an Instagram reel that showed displaced civilians bailing out an inundated tent. In January, she turned the camera on her own tent, describing how the rain seeped through the plastic sheeting as she slept.
The conditions that Owda depicted will be far worse when Gaza’s winter rains return this year after 14 months of unprecedented destruction that has left 90% of Gaza’s 2.1 million people displaced. Approximately 86% of Gaza’s landmass is under permanent evacuation order. A 29 September United Nations satellite analysis showed that Israeli military operations had damaged or destroyed 66% of all structures in the territory, including 227,591 housing units. By June, 67% of Gaza’s water and sanitation infrastructure was out of commission.
Each year, from December to February, some parts of Gaza receive one-third of their annual rainfall, and large swaths of the territory flood. A 2020 review in the Journal of Environmental Health Science and Engineering identified 34 factors that increase people’s risk of death in floods, such as cold temperatures and poor quality housing; Gaza currently qualifies for 33 of them.
In addition to casualties in Gaza caused directly by Israeli military action, tens of thousands of people have likely died from indirect causes due to Israel’s blockade of the territory and widespread destruction of infrastructure. Winter floods will exacerbate these issues, leaving the population more vulnerable to life-threatening health and environmental hazards. Without immediate, large-scale humanitarian intervention backed by the United States, Gaza’s water and sanitation crisis could cascade into an unprecedented catastrophe.
Al-Mawasi is a sandy, 9-mile-long strip of seaside land in southwestern Gaza that Israel has designated as the only “humanitarian safe zone” in the territory. Currently, 1.8 million people are thought to be living in al-Mawasi, almost all in makeshift tents. The Norwegian Refugee Council estimated in September that the area had a population density of some 78,000 people per square mile, approximately twice that of Cairo.
The coming winter rains will transform al-Mawasi and the rest of Gaza into a death trap. The combination of poor shelter, lack of drinking water, and abysmal sanitation will cause unknown numbers of preventable deaths. Waterborne diseases, acute diarrhoea, and infection often arise in such conditions. Floodwaters are a transmission vector for bacteria such as cholera-causing Vibrio cholerae, viruses such as Hepatitis A, parasites, and fungal infections. The inability to keep dry will also leave Palestinians in Gaza vulnerable to hypothermia and pneumonia.