Climate stress drives food, nutrition crisis

A new global assessment warns climate change is fundamentally reshaping food production and nutrition outcomes worldwide, with rising temperatures, erratic rainfall, and extreme weather creating structural food insecurity in vulnerable regions like East Africa. The Global Nutrition Report 2026, released in Rome, Italy, argues climate change is no longer an external disturbance but an internal driver of instability, directly impacting agricultural productivity and diet quality. The report details how production shocks now cascade through storage, transport, and market systems, amplifying price volatility and reducing access to diverse diets. These effects are most severe in areas reliant on informal markets and rainfed agriculture, where smallholder farmers face the greatest exposure. Even minor changes in rainfall patterns can lead to significant yield losses, income instability, and supply system breakdowns, particularly where adaptive capacity is limited. In Tanzania, shifting rainfall seasons, prolonged dry spells, and localized flooding are already disrupting planting cycles and undermining agricultural predictability. As food production becomes less reliable, households are forced to narrow their diets, prioritizing cheaper staples over nutrient-rich foods. This dietary contraction begins as an economic coping mechanism but evolves into a long-term nutritional pattern, reducing dietary variety and quality over time. Dr Jackline Jema, a Tanzanian nutrition specialist, notes these findings reflect real-world household struggles. Research from the Tanzania Food and Nutrition Centre shows persistent micronutrient deficiencies—such as iron, zinc, vitamin B12, vitamin A, folate, riboflavin, and vitamin C—among women of reproductive age. These gaps stem from structurally limited access to diverse foods, deepened by repeated disruptions in food availability and affordability. The report also highlights early childhood development risks, as climate variability reduces access to vegetables, legumes, and animal-source foods. Households have few alternatives, leading to long-term dietary imbalances that affect growth and health outcomes. Dr Jema emphasizes that these deficiencies are not short-term shortages but the result of cumulative disruptions in food systems.