Child Stunting and Temperature Anomalies: A Cross-Sectional Study in Burkina Faso and Kenya

Extreme temperatures linked to climate change threaten child health, particularly in Sub-Saharan Africa where malnutrition remains widespread. This study examines how exposure to hot and cold temperature anomalies influences child stunting in Burkina Faso and Kenya and evaluates how household infrastructure and socio-demographic factors interact with climate stressors to shape outcomes.

We combined nationally representative Demographic and Health Surveys (Burkina Faso 2021; Kenya 2022) with daily maximum and minimum temperature data from the Climate Hazards InfraRed Temperature with Stations (CHIRTS). The analytic sample included children aged 24-59 months. Temperature anomalies were calculated as standardized deviations from local historical averages. Multilevel logistic regression models assessed associations between stunting, climate anomalies, and household-level factors, including electricity, water, sanitation, wealth, and rural/urban residence.

Heat anomalies were linked to increased stunting risk in Kenya (β = 2.34, p < 0.001), while in Burkina Faso, higher maximum temperatures unexpectedly reduced stunting odds (β = 0.08, p < 0.05). Cold anomalies showed marginal positive associations with stunting in both countries. Infrastructure and socioeconomic factors varied by context: electricity access and urban residence were protective in Burkina Faso, while improved sanitation, household wealth, and child sex differences were significant in Kenya.

Climate anomalies and household conditions jointly influence stunting among children aged 24-59 months, with effects varying by country. Cold anomalies were associated with higher odds of stunting in Burkina Faso (BF OR = 2.14) and Kenya (KE OR = 1.20), while heat anomalies reduced stunting in BF (OR = 0.08) but increased it in KE (OR = 2.34). Electricity access was protective in both countries (BF OR = 0.61; KE OR = 0.71), while improved water, sanitation, and wealth were significant only in KE. Older child age consistently reduced stunting risk, and urban residence was protective only in BF. These findings underscore that climate impacts on stunting are context-specific and highlight the need for policies integrating climate adaptation with investments.