Food security has become one of the major concerns of the 21st century due to the increasingly noticeable effects of climate change . Not only is food availability at stake, but also social stability, health, and the survival of millions of people globally. Climate change has shown that no country, however developed, is exempt from facing substantial risks to its food supply.
In recent decades, a clear trend toward increased aridity has been observed across large areas of the planet , directly impacting access to water and, consequently, agriculture . Crops are becoming increasingly dependent on irregular rainfall and dwindling water resources. The rise in heat waves, droughts, and desertification has led to soil degradation and greater difficulties in cultivating the staple foods that underpin the global diet.
Global warming threatens food production
Recent studies indicate that, if current emissions trends continue, the production of key crops such as corn, wheat, and soybeans could fall by 40 to 50% in regions like the United States, China, and parts of Europe before the end of the century. For every degree Celsius that temperatures rise, humanity would lose approximately 120 calories per person per day in their average diet, an alarming figure for the most vulnerable populations. Furthermore, the decline in yields of vital crops increases the pressure on rural communities, where food insecurity and malnutrition are becoming increasingly common. In this context, it is important to highlight how the impact of climate change on agriculture is directly related to food security and climate.
The case of cassava in African regions illustrates how some crops traditionally considered resilient can also be compromised by extreme heat and drought . This increases the pressure on rural communities, where food insecurity can lead to malnutrition and forced migration.
Rural communities and migration: the forgotten by climate change
The impact on the rural population —especially in areas like Guatemala's Dry Corridor—is palpable. Unpredictable weather and reduced rainfall have forced many families to abandon their land. Migration, displacement, and the fragmentation of the social fabric are often unavoidable. This situation particularly affects women, who bear the responsibility for both agricultural work and family care, forced to travel greater distances to obtain water and barely managing to ensure daily subsistence.
Desertification and water scarcity also impact the health and customs of these communities. The loss of traditional knowledge about agricultural cycles, passed down through generations, is exacerbated in contexts where it is no longer possible to plant according to the climatic patterns of the past.
Strategies and limits of agricultural adaptation
Faced with the threat of climate change, science and policymakers are seeking new ways to adapt. The development of genetically modified crops to withstand extreme heat is emerging as one response, allowing some plants to maintain their yield even when temperatures exceed 40°C. Innovative techniques, such as gene editing and photosynthesis manipulation, open the door to greater agricultural resilience. However, it is also crucial to strengthen policies that promote sustainable agricultural practices, as highlighted in the challenges of sustainable land and water use.
However, experts insist that these technological solutions are not enough . A lack of funding to scale up these methods, along with social and regulatory barriers stemming from public distrust of genetically modified foods, complicates their implementation. Reducing greenhouse gas emissions and transitioning to sustainable energy models remain essential to avoid the worst consequences.
Water management, the land-climate nexus and the value of public policies
Another major challenge is managing water efficiently and equitably. Without guaranteed access to water, production costs will increase , generating a spiral of poverty and rural abandonment. Often, the technical solution of transporting water from afar or drilling deeper wells has considerable environmental and social impacts, in addition to making food more expensive.
National policies play a key role. Governments in various countries have launched initiatives to strengthen food security and consider agriculture a fundamental part of food sovereignty. However, peasant organizations warn of the risks of prioritizing export-oriented industrial agriculture over more sustainable models adapted to local conditions.
Therefore, integrating the voices of rural communities, strengthening coordination across sectors, and regulating land use while taking into account climate, development, and equity needs is essential.
The link between food security and climate represents one of the greatest contemporary challenges. The decisions we make today will determine whether future generations will have access to sufficient, safe, and affordable food, and whether rural livelihoods and agricultural biodiversity can be sustained.