Drought is draining water supplies and driving up food costs where you’d least expect

Taking shovels and buckets to a dried-up sandy belt of the Vhombozi River in Zimbabwe last August, groups of Mudzi district villagers gathered to dig with the hope of somehow finding water. The southern African region had entered into a state of severe drought, which had shriveled the Vhombozi, a primary water supply for more than 100,000 people.

Before long, a maze of makeshift holes revealed shallow puddles along the otherwise arid riverbed. The frantic digging had worked — there was water. There was just one big problem: It wasn’t blue. It was a muddy brown color, and villagers worried that consuming it would make them ill. But as there were scarcely other options, many took their chances with drinking it and bathing with it. 

Almost a year later, the persistent drought has led to a deluge of devastation on the region’s food system. Corn yields dropped 70 percent across the country, causing consumer prices to double. Thousands of cattle were lost to thirst and starvation. A local UNICEF emergency food distribution lost all of the food crops it harvested, which forced the NGO to reduce charitable food provisions from three meals a week to one. Child malnutrition levels in Mudzi doubled, driving up the demand for health care, and causing a quarter of health care clinics to run out of water reserves. Between January and March, about 6 million people in Zimbabwe faced food insecurity.

According to a new report by the U.S. National Drought Mitigation Center, or NDMC, and the U.N. Convention to Combat Desertification, or UNCCD, the combined effects of global warming, drought, and El Niño have triggered similar crises all over the world, from Mexico City to the Mekong Delta.

Using impact reports alongside government data, scientific and technical research, and media coverage of major drought events, the authors examined case-by-case how droughts compound poverty, hunger, energy insecurity, and ecosystem collapse in climate hot spots around the world. They measured impacts in 2023 and 2024, when the planet saw some of the most widespread and damaging drought events in recorded history. What they found is a lesson and a warning sign: Increasingly severe droughts caused by climate change are laying waste to ecosystems and economies everywhere. 

“This report is a blistering reminder that climate change and punishing drought are already devastating lives, livelihoods, and food access,” said Million Belay of the International Panel of Experts on Sustainable Food Systems, and general coordinator of the Alliance for Food Sovereignty in Africa, who wasn’t involved in the research. “We need to get serious about resilience and real adaptation.”

Mexico City

A focal point in the analysis is Mexico, where prolonged drought conditions provoked a water crisis that has had repercussions for food affordability and access. 

The situation began to intensify in 2023, when the country entered into a period of historically low rainfall. By June, the bulk of Mexico’s reservoirs dropped below 50 percent capacity. The rainy winter of 2023 brought some relief, but not enough. 

By the next summer, 90 percent of the country was experiencing some level of drought, and Mexico City’s water supply system reached a record low of 39 percent capacity. Abnormally low rainfall and high temperatures, made worse by inefficient water infrastructure and overextraction of the city’s aquifer, would persist into early 2025. These struggles to obtain water have been further exacerbated by distribution needs as mandated by a water-sharing treaty Mexico has long shared with the United States. 

A severe lack of water has been found to be closely linked with food insecurity, as water scarcity impacts food access through reductions in agricultural production that can fuel food shortages and higher grocery prices. Roughly 42 percent of Mexico’s population was food-insecure in 2021, according to national statistics, with consumer food inflation rates steadily climbing since then. Price hikes were eventually reflected in grocery stores, causing the costs of produce like cilantro to soar by 400 percent, alongside other climbing price tags for goods like onions, broccoli, and avocados. 

“Ripple effects can turn regional droughts into global economic shocks,” said NDMC’s Cody Knutson, who co-authored the report. “No country is immune when critical water-dependent systems start to collapse.” 

Amazon Basin

During those same years, the Amazon River Basin became another drought and hunger hot spot. According to the new report, climate change caused waterways to drop to historically low levels in September of 2023. Drinking water became contaminated by mass die-offs of marine life, and local communities weren’t able to eat the fish they rely on. 

Supply chain transportation was also greatly affected, as the low water levels made it impossible for boats to travel in and out of certain regions. Brazil’s AirForce would be deployed to distribute food and water to several states where river supply routes were impassable. 

Residents in some towns dug wells on their own properties to replace river water they would normally depend on for drinking, cooking, and cleaning, according to the U.N.-backed report. Others were stuck waiting on government aid. Disruptions to drinking water and food supplies due to low river levels continued through late 2024 as the drought persisted. By September, waterways that had previously been navigable were bone-dry. 

A 2025 report released by the nonprofit ACAPS found that many communities in the Amazon region were already believed to be suffering malnutrition, making them more vulnerable to the emerging health and food insecurity effects of the drought. 

Climate change plays “a critical role in food security,” said FAO economist Jung-eun Sohn, who is unaffiliated with the UNCCD report. He noted that warming not only can impact both availability of and access to food, but that natural hazards are “one of three main risks of food insecurity,” along with conflict and economic risks, in hunger hot spots. 

Mekong Delta 

Though a central contributor to the interconnected water-and-food crisis, climate change isn’t the only factor in many hunger hot spots — failing infrastructure and inefficiencies in water delivery systems have also been flagged as critical contributors to widespread water shortages. The compounding effect of El Niño, or a naturally-occurring weather phenomena that drives above-average global heat and more intense natural disasters in parts of the planet, is another culprit. 

“It’s now abundantly clear that industrial, chemical-intensive agriculture, with its high water demands and uniform crops, is deeply vulnerable to drought and intensifying the crisis,” said Belay, the IPES expert. 

One study found that saltwater intrusion, much like what persistently plagues the Mekong River Delta in Vietnam, also causes a significant reduction in food production. The watershed flows through six Asian countries, and over 20 million people depend on the rice grown in the region, which is Vietnam’s most productive agricultural area. It is also the region of Vietnam that is most vulnerable to hunger, with up to half of its rural households struggling to afford enough food. 

So when an early heat wave struck the Mekong Delta in 2024, and an abnormally long dry spell followed suit, causing canals to dry up, excessive salinity, heat, and water scarcity killed farmers’ catch in droves, reducing what communities were able to supply and sell, which led to shortages that prompted the local government to intervene and help producers quickly sell their wares. As the drought persisted, communities undertook other desperate measures to mitigate losses; renovating ditches, constructing temporary reservoirs, digging wells, and storing fresh water. Even so, according to the report, up to 110,000 hectares of agricultural resources, including fruit crops, rice fields, and aquaculture, have been impacted in the last year by the drought and excess salinity. The situation contributed to rice shortages, prompting a widespread inflationary effect on market prices.

“These instances highlight how interconnected our global economies and food supplies are,” Paula Guastello, NDMC drought impacts researcher and lead author of the report, told Grist. “Drought has widespread implications, especially when it occurs on such a large, intense scale as during the past few years. In today’s global society, it is impossible to ignore the effects of drought occurring in far-off lands.” 

All told, the authors argue that without major reductions in greenhouse gas emissions, rising temperatures will lead to more frequent and severe droughts by continuing to inflate heat, evaporation, and volatile precipitation patterns. All the while, urbanization, land use changes, and population growth are expected to continue to strain water resources and influence which assets and areas are most vulnerable to drought impacts. The world’s resilience to those impacts, the report denotes, ultimately depends on the fortification of ecosystems, the adoption of changes to water management, and the pursuit of equitable resource access. 

“Proactive drought management is a matter of climate justice, equitable development, and good governance,” said UNCCD Deputy Executive Secretary Andrea Meza in a statement about the report.

Stronger early warning systems and real-time drought impact monitoring, for example, those that assess conditions known to fuel food and water insecurity, are some of the ways countries can better fortify their systems in preparedness for the next big drought event. Others include watershed restoration, the broad revival of traditional cultivation practices, and the implementation of alternative water supply technologies to help make infrastructure more climate-resilient. Adaptation methods, however, must also account for the most vulnerable populations, the authors say, and require global cooperation, particularly along critical food trade routes. 

“Drought is not just a weather event,” said report co-author and NDMC assistant director Kelly Helm Smith. “It can be a social, economic, and environmental emergency. The question is not whether this will happen again, but whether we will be better prepared next time.”