Accurate measurement of the depth of acute food insecurity remains a major gap in current global monitoring systems. While the Integrated Food Security Phase Classification (IPC) identifies the scale and geographic distribution of populations in crisis, it does not quantify the magnitude of food intake shortfalls faced by affected populations. This paper outlines an exploratory data exercise that tests three proxy approaches to estimating food gaps using available IPC and DIEM data. First, we derive back-of-envelope caloric deficit estimates by IPC phase using thresholds from the Household Economy Approach. Second, we assess whether widely used dietary diversity, experiential food insecurity, and coping capacity indicators can serve as proxies for calorie deficits by analyzing their cross-indicator correlations. Third, using microdata from FAO's DIEM surveys matched to IPC area phases, we estimate indicator-specific shortfalls using a Foster-Greer-Thorbecke gap framework and translate these into food assistance estimates. The results show that proxy indicators cannot be used interchangeably to estimate caloric shortfalls, reflecting weak cross-indicator correlations consistent with the existing literature. Within-phase heterogeneity is wide and data limitations are substantial. The paper documents these approaches and their limitations as an intermediate step. The paper provides several recommendations for improving data collection that would allow for more reliable food gap estimates using the framework presented in this paper, which in turn could then operationalized for humanitarian agencies to ‘right size’ and better target food assistance to populations facing acute food insecurity.

The food security situation in Lebanon has worsened following the drastic escalation in hostilities and widespread displacement that began in early March 2026. Around 1.24 million people are facing high levels of acute food insecurity (IPC Phase 3 or above) between April and August 2026, which is worse than was previously projected for this period in the IPC analysis released in October 2025. The declining food security conditions are experienced among all population groups and reverses any improvements observed in the previous reporting period. The biggest increases in populations in Phase 3 or above are found in the southern governorates, particularly in Bent Jbeil, Marjaayoun, El Nabatieh and Sour districts, among both Lebanese and Syrian refugee populations. In these areas, high levels of acute food insecurity are affecting 55 to 65 percent of the population, including approximately 10 percent of people who are in IPC Phase 4 (Emergency).

Between April and July 2026, an estimated 7.8 million people in South Sudan are facing high levels of acute food insecurity (IPC AFI Phase 3 or above). This represents an increase of approximately 280,000 people compared to the September 2025 IPC analysis. Around 73,000 people are classified in IPC AFI Phase 5 (Catastrophe) and are experiencing extreme food consumption gaps associated with starvation, heightened risk of death, and the collapse of livelihoods. A further 2.5 million people are in IPC AFI Phase 4 (Emergency), facing large food gaps and very high levels of acute malnutrition, while approximately 5.3 million people in IPC AFI Phase 3 (Crisis) are unable to meet essential food needs without resorting to unsustainable coping strategies.

Prolonged dry spells, flooding, persistently high staple food prices, declining household purchasing power, and limited income opportunities are driving around 10 percent of the analysed population in rural districts of mainland Tanzania into high levels of acute food insecurity (IPC Phase 3 or above). The impact is particularly severe among households that depend on agricultural labour, livestock, and crop production. During the current analysis period (February–May 2026), which coincides with the peak lean season in single‑season (unimodal) agricultural districts, approximately 1 million people are experiencing IPC Phase 3 (Crisis) conditions, unable to meet their essential food requirements and resorting to unsustainable coping measures.
This IPC analysis for mainland Tanzania covers 30 vulnerable rural districts across 11 regions, including 20 districts with bimodal agricultural seasons and 10 districts with a unimodal season. Together, these districts are home to approximately 10 million people, representing around 15 percent of the national population. These areas are repeatedly affected by shocks—such as climatic variability and market instability—that consistently undermine food security and erode household purchasing power.

Acute food insecurity has reached critical levels across Kenya’s 23 Arid and Semi-Arid Lands (ASALs) and surrounding areas. An estimated 3.3 million people are currently classified in IPC Acute Food Insecurity (AFI) Phase 3 or above, including 400,000 people in IPC AFI Phase 4 (Emergency) who require immediate, life-saving assistance. This marks a 52 percent increase from early 2025 (2.15 million people) and exceeds the October 2025–January 2026 projection, which had estimated 2.12 million people in IPC AFI Phase 3 or above.
Additionally, refugee settlements in Dadaab, Kakuma, and Kalobeyei face similarly dire conditions. Approximately 429,000 people—around two-thirds of the population—are in IPC AFI Phase 3 or above, and all three settlements are in IPC AFI Phase 4 (Emergency). This is driven by sharp reductions in humanitarian assistance, limited livelihood options, and high reliance on costly markets. Without a significant increase in food, non-food, and livelihood support, conditions are expected to remain critical.

More than one-fifth of the analysed population in Pakistan is facing high levels of acute food insecurity due to the residual impacts of the 2025 monsoon floods, prolonged drought and dry spells, and localised insecurity. Approximately 7.5 million people (21 percent of the analysed population) are classified in IPC Phase 3 or above (Crisis or worse) between December 2025 and March 2026. This includes around 1.25 million people experiencing critical levels of acute food insecurity, IPC Phase 4 (Emergency), characterised by large food gaps and high levels of acute malnutrition. Another 6.3 million people in IPC Phase 3 (Crisis) are unable to meet their essential food requirements and forced to resort to unstainable coping measures. Immediate, life-saving assistance is needed to prevent a further deterioration and to prevent affected populations—particularly those in Phase 4—from facing catastrophic conditions.