BANGLADESH stands on the frontline of climate change. Rising temperatures, erratic rainfall, cyclones, floods and creeping salinity are no longer distant environmental concerns. They are daily realities. While much of the national conversation focuses on infrastructure damage, crop loss or economic costs, a quieter and more devastating crisis is unfolding: the growing threat to maternal and neonatal health. Climate change is not only melting glaciers or intensifying storms, it is also reshaping the conditions in which pregnancies begin, develop and end. For a country already grappling with healthcare disparities and climate vulnerability, the consequences are profound.
Over the past decade, Bangladesh has experienced increasingly frequent and intense heatwaves. Globally, each of the last four decades has been warmer than the one before it. Rising ambient temperatures are not merely uncomfortable, they are also medically dangerous, especially for pregnant women. Pregnancy places immense physiological demands on the body. Cardiac output increases, plasma volume expands and metabolic heat production rises due to foetal growth. The natural adaptations make thermoregulation more difficult. When exposed to extreme heat, pregnant women face higher risks of dehydration, heat stress and cardiovascular strain.
For every 1°C increase in temperature above 25°C, preterm birth rates rise by about 5 per cent in vulnerable regions. Preterm birth is not a minor complication. It is one of the leading causes of neonatal mortality and is associated with lifelong developmental challenges. Extreme heat is also linked to low birth weight, stillbirth and gestational hypertension. When maternal core body temperature rises excessively, placental blood flow may decrease, reducing oxygen supply to the foetus. In severe cases, hyperthermia, defined as maternal temperatures exceeding 39°C, may have teratogenic effects and potentially affect foetal development. In Bangladesh, where many women work outdoors or in a poorly ventilated environment and lack access to cooling systems, the risks are magnified. Heat exposure is not evenly distributed. It disproportionately affects low-income households and rural communities.
Beyond heat, Bangladesh’s coastal regions faces another climate-driven threat: salinity intrusion. Rising sea levels and storm surges push saline water further inland, contaminating drinking water sources. For pregnant women, increased salinity intake has serious health implications. Studies indicate that about 23.5 per cent of pregnant women in saline-prone coastal areas suffer from gestational hypertension. Elevated sodium levels in drinking water are strongly associated with high blood pressure during pregnancy. Gestational hypertension significantly increases the risk of pre-eclampsia and eclampsia that is a life-threatening condition that can lead to seizure, organ failure and maternal death.
For newborns, the consequences may include preterm delivery, low birth weight or stillbirth. In a country where maternal mortality has been steadily declining over the past decades through targeted intervention, climate-induced hypertension threatens to reverse hard-won gains. Salinity is not dramatic like a cyclone. It is silent and persistent, embedding itself in daily life and long-term health outcomes.
Bangladesh’s monsoon floods and cyclones disrupt more than roads and houses. They disrupt care. Maternal health depends on consistent antenatal visits, skilled birth attendance, emergency obstetric services and postnatal monitoring. When floods wash away transport routes and damage health facilities, these services become inaccessible. Evidence suggests that major flood events are associated with about a 30 per cent reduction in antenatal care visits in affected regions. Missed appointment means undiagnosed hypertension, unmanaged anaemia, untreated infections and a delayed detection of foetal complications. In remote and char areas, pregnant women may be forced to deliver at home without skilled assistance during extreme weather events. The result is increased risk of maternal haemorrhage, obstructed labour complications, neonatal asphyxia and infection. Climate disasters amplify inequalities. Women from poorer households, marginalised communities and climate-vulnerable districts bear a disproportionate burden. What begins as an environmental shock becomes a health crisis.
The implications of climate stressors extend beyond birth. Exposure to extreme heat, malnutrition, infections and environmental pollutants during pregnancy can shape long-term health outcomes for children. Emerging evidence suggests that in-utero exposure to environmental stress may influence immune development, metabolic disorders and cognitive outcomes. Globally, about 295,000 maternal deaths, 2.5 million neonatal deaths and two million stillbirths occur annually where the majority is in low-income settings. Climate change threatens to push the numbers higher. Projections warn of an additional 250,000 deaths annually between 2030 and 2050 from climate-sensitive conditions such as malnutrition, diarrhoea, malaria and heat stress. For Bangladesh, one of the world’s most climate-vulnerable nations, this is not a distant forecast. It is an emerging reality.
Bangladesh’s vulnerability is rooted in geography, population density and socioeconomic structure. Large segments of the population depend on climate-sensitive livelihoods such as agriculture and fisheries. Urban informal settlements often lack adequate housing, sanitation and cooling infrastructure. Healthcare facilities in rural areas are already stretched thin. When extreme heat coincides with power shortage, floods coincide with fragile roads and salinity contaminates shallow tube wells, the maternal health becomes a collateral damage. Women’s biological vulnerability during pregnancy intersects with systemic vulnerabilities such as poverty, gender inequality and limited decision-making power. The result is a layered risk structure where climate hazards translate directly into health harms.
This crisis demands a multi-sectoral response. Climate adaptation must move beyond embankments and disaster shelters. It must include maternal and neonatal health protection. First, climate-resilient healthcare infrastructure is essential. Health facilities in flood-prone areas should be elevated and structurally reinforced. Backup power systems and cooling mechanisms must be installed in maternity wards. Mobile clinics can ensure continuity of care during extreme weather events. Second, early warning systems should integrate maternal health advisories. Heat alerts can include guidance for pregnant women on hydration, reduced outdoor exposure and signs of heat stress. Community health workers can play a vital role in disseminating targeted messages.
Third, safe drinking water solutions are critical in coastal regions. Investment in desalination technologies, rainwater harvesting systems and improved water management can reduce salinity-related hypertension. Fourth, antenatal care must incorporate climate risk screening. Health professionals should assess heat exposure, water salinity sources and disaster vulnerability as part of routine maternal health evaluation. Fifth, climate change education should be integrated into medical and public health curricula. Healthcare providers must understand the physiological pathways through which climate stress affects pregnancy and newborn outcomes.
Finally, research investment is urgently needed. While global evidence is growing, localised, district-level data on temperature, salinity, flooding and specific birth outcomes in Bangladesh remain limited. Robust surveillance systems can help policymakers design targeted interventions.
Climate change is a global phenomenon, but its burdens are not evenly shared. Bangladesh contributes minimally to global greenhouse gas emissions, yet its mothers and newborns face disproportionate health risks. Protecting maternal and neonatal health in the era of climate change is not only a medical priority, it is also a moral imperative. The womb should not become another casualty of global warming. Bangladesh has demonstrated resilience before. Its achievements in reducing maternal mortality and expanding community health services are globally recognised. But, climate change is testing these gains.
If adaptation strategies fail to account for maternal and neonatal vulnerability, progress could stall or reverse. Conversely, if policy-makers integrate climate resilience into public health planning today, Bangladesh can safeguard its next generation even in a warming world. The climate crisis is often measured in degrees Celsius and sea-level rise. It should also be measured in premature births prevented, hypertensive pregnancies managed and newborn lives saved. Because when climate change enters the delivery room, the cost is counted in heartbeats.
Arghya Protik Chowdhury ([email protected]) is a student of environmental science in the Bangladesh University of Professionals.
