CHAMNHA: Climate, heat and maternal and neonatal health in Africa

Lead Research Organisation: London School of Hygiene & Tropical Medicine
Department Name: Public Health and Policy


The frequency and intensity of heat waves have increased in sub-Saharan Africa (SSA) and are set to escalate in the coming decades. Heatwaves present major health threats, especially for vulnerable population groups, such as those with limited socio-economic resources or compromised physiological ability to respond to heat stress. Pregnant women and neonates (<28 days after birth) have a unique set of health vulnerabilities, particularly in low- and lower-middle income countries (LLMICs), where pregnancy and childbirth are often highly precarious. Heat exposure complicates Maternal and Neonatal Health (MNH), increasing risks for maternal haemorrhage and sepsis, prematurity, low birth weight and neonatal dehydration. Few studies have assessed these impacts in sub-Saharan Africa, where maternal and neonatal deaths are frequent, facilities experience high indoor temperatures, health systems have low adaptive capacity and access to services is increasingly disrupted by climate events.
The proposed study (CHAMNHA) is led by a transdisciplinary team from 3 continents, spanning the natural, health and social sciences, and will address key knowledge gaps around heat and MNH in SSA in collaboration with stakeholders, employing qualitative and quantitative methods, implementation and evaluation science, and climate impact methods. The project is divided into three work packages (WP). WP1 will quantify impacts of heat exposure on MNH outcomes, using trial data, birth cohorts and other data sources from SSA, Norway and Sweden. We will characterize these impacts and identify sub-groups at high-risk. In WP2, qualitative research will document perceptions and local practices relating to heat exposure in pregnant women and neonates in Burkina Faso and Kenya. Then, in conjunction with pregnant women, male partners and health workers, we will co-design community- and facility-based interventions, such as improving preparedness for heat, e.g. through warning systems; changing behaviours and health worker practices to reduce heat impacts on MNH; training birth companions and traditional birth attendants on heat reduction during childbirth; and promoting breastfeeding and optimised hydration for women and neonates. WP3 will test the acceptability, feasibility and effectiveness of selected interventions using a randomized design (Kenya) and pre-post study design (Burkina Faso). In WP4, building on established collaborations with stakeholders, ministries of health and WHO, we will translate research findings into recommendations for improved MNH practice in the health sector, and national adaptation planning to reduce the current and future impacts of climate change on MNH

Planned Impact

More targeted, evidence-based intervention in the neglected area of heat impacts will lead to social and economic benefits for women, children, their families and their communities through improved health and reduced household expenditure on medical care and lost income. If specific interventions we test in this study are found to be effective and feasible to implement, the translation of these findings into concrete policy and practice changes will also contribute to improving health and well-being in other population groups. The new epidemiological evidence will support WHO and the Institute of Health Metrics in the assessment of the burden of disease due to climate change and improve health guidance.
This evidence could be used to increase a focus on MNH and climate change in the policy environment, and to support arguments for integration of heat interventions in existing health services. There is precedent for rapid action on evidence related to risk assessment in children that serves as a guide. For instance, evidence of foetal harms from maternal alcohol use became a central argument for stronger alcohol controls and the creation of public health messaging about the dangers of drinking during pregnancy. Better evidence on the impact of extreme heat on MNH will help guide appropriate policy in this area.
The most important potential beneficiaries of this research are pregnant women and neonates. Given the causal pathways, a number of potential low-risk and low-cost interventions can be readily identified, including, for example, increased natural ventilation and cooling interventions in labour wards and community settings, prioritisation of hydration during labour and in neonates, heat 'counselling' by birth companions, educational interventions using social media alerts, and the setting of specific heat-warning thresholds and plans for pregnant women.
We will engage with Ministries of Health and Environment to facilitate this process. National and international policy-makers in LLMICs will benefit from practical implementation lessons and epidemiological evidence. The data are expected to demonstrate that the simplicity of the interventions means that training needs will be minimal and that no additional personnel will be needed - an important consideration in LLMIC settings.
We will ensure that our evidence is used beyond the study countries (Burkina Faso and Kenya) by engaging closely with regional networks to maximize impacts. The IRSS (Institute de Recherche en Sciences de la Sante, Burkina Faso) is a regional hub for global health research. In the final year, we will host a conference in IRSS for the regional health and climate stakeholders. We will also make use of the African networks for climate - including CLIM-DEV and the ACDI (African Climate and Development Institute) and also funded research projects that have African partners.


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Ebi KL (2021) Hot weather and heat extremes: health risks. in Lancet (London, England)

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Haghighi MM (2021) Impacts of High Environmental Temperatures on Congenital Anomalies: A Systematic Review. in International journal of environmental research and public health

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Lakhoo DP (2022) The Effect of High and Low Ambient Temperature on Infant Health: A Systematic Review. in International journal of environmental research and public health

Description Heatwaves are increasing in countries in Africa and are expected to intensity in the coming years due to climate change. High environmental temperatures present major health threats, especially for pregnant women and infants, and in populations with week and underperforming health systems. CHAMNHA is an inter-disciplinary research project funded by the Belmont Forum that will provide evidence for addressing heat risks within current maternal and new born health strategies in Africa. Health facilities in sub-Saharan Africa can experience high indoor temperatures and health systems have low adaptive capacity and access to services is increasingly disrupted by climate events. Health workers, pregnant women and post-partum mothers report a range of problems from extreme heat. A systematic review of the impact of high temperatures on maternal outcomes found that hot weather increases the risk of pre-term birth and low birthweight (Chersich et al. 2020). There is also evidence that high temperatures increase the risk of congenital anomalies (Haghghi et al. 2021). We have found evidence of an effect of high temperature on infant feeding practices. High temperatures reduce the time spent breast-feeding, and this effect is greater for older infants (Part et al. 2022). High temperatures in the first weeks of pregnancy increase the risk of maternal hypertension. Low temperatures in the third trimester also increase the risk of maternal hypertension (Part et al. 2022).
Exploitation Route The findings from the CHAMNHA project will be used to inform maternal and neonatal health services in order to make them more resilient to climate change and improve patient care. Two interventions have been developed to communicate risks to pregnant and post-partum women regarding protection from heat risks. These have been tested in Burkina Faso and Kenya.
Sectors Healthcare

Description Our project had raised awareness of the risks to pregnant women and infants from high ambient temperatures. There has been an increase in interest in this topic from key agencies including WHO, and USAID. We have contributed to the USAID interesting group on Maternal Health and Climate Change. We held a joint session with UNFPA at the Geneva Health Forum in May 22. Our research has featured in National Geographic. 25 August 2022. "Here's how extreme heat is hurting pregnant women" and Dr Adelaide Lusambili was interviewed in the New York Times. CHAMNHA research was presented at the COP27 events in Egypt. - WHO Health Pavilion, 14 November. Climate change and Womens Health. Organised by WHO, UNFPA, CHAMNHA. -COP27 Africa Regional Resilience Hub virtual event "Dealing with extreme heat in African Cities: what does it take?" Adelaide Lusambili presented CHAMNHA findings. 19-22 September. Led by SouthSouthNorth and the Climate and Development Knowledge Network.
First Year Of Impact 2022
Sector Healthcare
Impact Types Societal,Policy & public services

Description (ENBEL) - Enhancing Belmont Research Action to support EU policy making on climate change and health
Amount € 2,993,208 (EUR)
Funding ID 101003966 
Organisation European Commission 
Sector Public
Country European Union (EU)
Start 11/2020 
End 10/2023
Description Developing data science solutions to mitigate the health impacts of climate (Heat-Hub)
Amount $6,500,000 (USD)
Funding ID U54TW012083 
Organisation National Institutes of Health (NIH) 
Sector Public
Country United States
Start 09/2021 
End 08/2026
Description Framework on Climate Change and Maternal Health
Amount $28,000 (USD)
Funding ID ref 
Organisation World Health Organization (WHO) 
Sector Public
Country Global
Start 12/2021 
End 01/2022
Description Contributions to USAID Working Group on Maternal Health and Climate Change 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Policymakers/politicians
Results and Impact USAID has established a Working Group on Maternal Health and Climate change. Several members of the CHAMNHA project are members of this working (Dr Kovats, Dr Chersich, Prof Filippi). We have given several presentations to this group: Sari Kovats gave a Brown Bag presentation on 20 Sept 2021, Matthew Chersich on 10 January 2022. (Sari Kovats has been invited to give follow up presentation later in 2022).
USAID Africa Bureau Health Team has produced a Podcast on MNH and climate change (with interviews with Dr Sari Kovats @LSHTM and Prof Kris Ebi @UW)
Year(s) Of Engagement Activity 2021
Description Presentation of findings at COP26 Health Pavillion (Nov 2021) 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Policymakers/politicians
Results and Impact o "Heat, Overlooked Populations and Maternal and Newborn Health" organised by USAID. 5 November 2021. Veronique Filippi presented CHAMNHA results
o Colliding Disasters: Adapting to climate risks and disasters. 3 November 2021. Organised by the Red Cross and CICERO (ENBEL). Sari Kovats presented on vulnerability of pregnant women to climate risks.
Year(s) Of Engagement Activity 2021