Scientists warn that water risk threatens iconic heritage sites such as the Victoria Falls in Zimbabwe. Credit: Busani Bafana/IPS
By Busani Bafana
BULAWAYO, Sep 3 2025 – From Zimbabwe’s ‘The Smoke that thunders,’ Victoria Falls, to the awe-inspiring Pyramids in Egypt and the romantic Taj Mahal in India, these iconic sites are facing a growing threat – water risk.
Several World Heritage sites could be lost forever without urgent action to protect nature, for instance, through the restoration of vital landscapes like wetlands, warns a new report by the World Resources Institute (WRI) following an analysis indicating that droughts and flooding are threatening these sites.
World Heritage sites are places of outstanding universal cultural, historical, scientific, or natural significance, recognized and preserved for future generations through inscription on the World Heritage List of the United Nations Educational, Scientific, and Cultural Organization (UNESCO).
About 73 percent of the 1,172 non-marine World Heritage sites are exposed to at least one severe water risk, such as drought, flooding, or river or coastal flooding. About 21 percent of the sites face dual problems of too much and too little water, according to an analysis using WRI’s Aqueduct data.
While the global share of World Heritage Sites exposed to high-to-extremely high levels of water stress is projected to rise from 40 percent to 44 percent by 2050, impacts will be far more severe in regions like the Middle East and North Africa, parts of South Asia, and northern China, the report found.
The report highlighted that water risks were threatening many of the more than 1,200 UNESCO World Heritage Sites. The Taj Mahal, for example, faces water scarcity that is increasing pollution and depleting groundwater, both of which are damaging the mausoleum. In 2022, a massive flood closed down all of Yellowstone National Park and cost over USD 20 million in infrastructure repairs to reopen.
River Flooding is affecting the desert city of Chan Chan in Peru. According to WRI’s Aqueduct platform, the UNESCO site and its surrounding region in La Libertad face an extremely high risk of river flooding. By 2050, the population affected by floods each year in an average, non-El Niño year in La Libertad is expected to double from 16,000 to 34,000 due to a combination of human activity and climate change. In an El Niño year, that increase may be much higher.
In addition, the biodiversity-rich Serengeti National Park in Tanzania, the sacred city of Chichén Itzá in Mexico, and Morocco’s Medina of Fez are facing growing water risks that are not just endangering the sites but also the millions of people who depend on them for food, livelihoods, or a connection to their culture or who just enjoy traveling to these destinations, the report said.
Straddling the border between Zambia and Zimbabwe, the Victoria Falls was inscribed on the World Heritage site in 1989 for its vital ecosystem and essential source of livelihoods for thousands of people, and a major tourism drawcard.
Despite its reputation for massive cascading water, Mosi-oa-Tunya/Victoria Falls has faced recurring drought over the past decade and at times dried up to barely a trickle. The report stated that the rainforest surrounding Mosi-oa-Tunya/Victoria Falls is home to a rich diversity of wildlife and plants.
According to WRI, Victoria Falls experienced droughts as recently as 2016, 2019, and 2024. Research on rainfall patterns near Mosi-oa-Tunya/Victoria Falls shows that the onset of the rainy season, normally in October, is arriving later in the year. That means in a drought year, it takes longer for relief to arrive, and the longer the drought continues, the more it affects the people, crops, and economy around it.
An Aqueduct analysis found that Victoria Falls ranks as a medium drought risk, below the more than 430 UNESCO World Heritage Sites that rank as a high drought risk. This is primarily because relatively low population density and limited human development immediately surrounding the site reduce overall exposure.
“However, the site faces increasing pressure from tourism-related infrastructure development, and data shows the probability of drought occurrence ranks high—a finding reinforced by the many recent droughts that have plagued the region,” said the report. “Climate change is not only expected to make these droughts more frequent, but recovery is expected to last longer, especially in places that aren’t prepared.
“The time between droughts may not be long enough for the ecosystem to recover, which is particularly concerning for Mosi-oa-Tunya/Victoria Falls.”
Restoring nature, a solution to plugging water risks
The report recommends swift action to restore vital landscapes locally that support healthy, stable water and investment in nature-based solutions like planting trees to restore headwater forests or revitalize wetlands to capture floodwaters and recharge aquifers. Political commitment is key to making this happen.
Besides, countries have been urged to enact national conservation policies to protect vital landscapes from unsustainable development globally, and water’s status as a global common good needs to be elevated while equitable transboundary agreements on sharing water across borders are established.
Zimbabwe hosted the 15th meeting of the Conference of the Parties (COP15) to the Ramsar Convention in Victoria Falls under the theme ‘Protecting Wetlands for our Common Future.’ The protection of global water resources is now more urgent.
“You will find the political will to invest in nature exists all over the world,” Samantha Kuzma, Aqueduct Data Lead at the World Resources Institute, told IPS. “Dedicated communities are finding ways to protect and restore vital landscapes like wetlands. The problem is that these efforts are piecemeal. Globally, we are not seeing the political will at the scale needed to achieve real, lasting change.”
The world needs to mobilize up to $7 trillion by 2030 for global water infrastructure to meet water-related SDG commitments and address decades of underinvestment, according to the World Bank. Currently, nearly 91 percent of annual spending on water comes from the public sector, including governments and state-owned enterprises, with less than 2 percent contributed by the private sector, the World Bank says, pointing out the importance of firm commitment to reforming the water sector through progressive policies, institutions, and regulations, and better planning and management of existing capital allocated to the sector.
“We are at the point where inaction is more costly than action,” Kuzma told IPS, emphasizing that the world must do a better job of understanding water’s fundamental role in sustaining economies because its value is everywhere and invisible until it’s at risk.
“Take UNESCO World Heritage Sites, for example. Their ecological and cultural worth is priceless, and in purely pragmatic terms, they’re often the linchpin of local economies,” said Kuzma. “Any closure or damage will send immediate ripple effects through communities. It is safe to say that globally, we are falling short when it comes to protecting nature. But to change course, we must first understand why.”
IPS UN Bureau Report
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