Infrastructure fails, clinics close, women cannot reach care
When extreme weather strikes the world's most vulnerable regions, it does not merely damage roads and buildings — it severs the fragile threads connecting pregnant women to the care that sustains life. A scoping review published in BMJ Open has traced this quiet catastrophe across low- and middle-income countries, finding that floods, droughts, and intense heat consistently disrupt maternal health services, deepen malnutrition, elevate stress, and in some cases, end lives. The study arrives as a reminder that climate and poverty are not separate crises, but forces that amplify one another in the bodies of mothers and the futures of their children.
- Extreme weather events in low- and middle-income countries are not just environmental disasters — they are maternal health emergencies, cutting off pregnant and postpartum women from the clinics, supplies, and care they cannot afford to lose.
- Four recurring harms emerged from the research: blocked access to health services, malnutrition, sustained psychological stress, and preventable death — each one compounding the others in a cascade that begins with a storm and ends in a delivery room that never opens.
- The evidence base itself is dangerously thin: most existing studies draw from middle-income settings or from wealthier urban populations, leaving the poorest and most exposed women — those in rural, resource-scarce regions — largely invisible in the data.
- Researchers are now calling for targeted studies in the lowest-income countries, arguing that findings from better-resourced settings cannot be assumed to reflect the reality where infrastructure is already minimal and a single flood can erase what little exists.
When a storm strikes a low-income country, the destruction reaches beyond flooded streets — it enters maternity wards, breaks supply chains for prenatal care, and leaves pregnant women stranded. A review published in BMJ Open has documented this cascade, finding that extreme weather events damage the infrastructure mothers depend on during pregnancy, childbirth, and the weeks after delivery.
The World Health Organization defines maternal health broadly, encompassing not just survival but protection from gestational diabetes, pre-eclampsia, postpartum hemorrhage, and the psychological toll of pregnancy under duress. When a mother's mental health deteriorates under sustained anxiety or trauma, the consequences extend to her child — higher miscarriage rates, lower birth weights, developmental delays. Mother and child are inseparable in their vulnerability.
Researchers conducted a scoping review of 15 studies focused specifically on low- and middle-income countries, excluding wealthy nations on the grounds that their infrastructure and disaster response systems bear little resemblance to poorer regions. Four outcomes emerged consistently: difficulty accessing maternal health services, malnutrition, elevated stress, and mortality. These are not abstractions — a woman who cannot reach a clinic cannot be screened for complications; a malnourished mother cannot adequately nourish her fetus.
The review also exposed a critical gap: most existing evidence comes from middle-income countries, or from studies of women in wealthier urban settings — populations whose access to resources does not reflect the reality of the most vulnerable regions. The researchers concluded that these findings cannot simply be applied to mothers living where infrastructure is already minimal and post-disaster support systems barely exist.
We know that extreme weather harms maternal health, and we know the mechanisms. What we lack is robust evidence from the places where the harm is likely most severe. The researchers are calling for expanded studies in the lowest-income settings — research that accounts for resource scarcity and asks how poverty compounds what weather alone inflicts.
When a storm hits a low-income country, the damage extends far beyond fallen trees and flooded streets. It reaches into maternity wards, disrupts supply chains for prenatal care, and leaves pregnant women stranded without access to the medical attention they need. A new review published in BMJ Open has documented this cascade of harm, finding that extreme weather events—floods, hurricanes, droughts, intense heat—damage the very infrastructure that mothers depend on during pregnancy, childbirth, and the weeks after delivery.
The World Health Organization defines maternal health broadly: the physical and mental wellbeing of women from conception through six weeks postpartum. It is not simply about survival, though that matters. It encompasses protection from gestational diabetes, pre-eclampsia, postpartum hemorrhage, and the psychological toll of carrying a child under stress. When a mother's mental health deteriorates—when she experiences sustained anxiety or trauma—the consequences ripple outward: higher rates of miscarriage, lower birth weights, developmental delays in infants. The health of the mother and the health of the child are inseparable.
Yet maternal health in resource-poor regions faces a threat that has received surprisingly little systematic study. Researchers wanted to understand how extreme weather events—defined as weather patterns that deviate sharply from what a region typically experiences—disrupt the already fragile systems that pregnant women depend on. They conducted a scoping review of existing research, looking specifically at low- and middle-income countries, and focusing on maternal health outcomes rather than just birth outcomes. They excluded studies of earthquakes, tsunamis, and volcanic eruptions, and they excluded any research conducted in wealthy nations, reasoning that the infrastructure and disaster response systems in rich countries bear little resemblance to what exists in poorer regions.
The review identified 15 studies meeting these criteria. Four were quantitative—measuring specific health outcomes with numbers. Eleven were qualitative, capturing the lived experiences and perceptions of the women themselves. The quantitative studies showed a clear pattern: when extreme weather disrupted infrastructure, pregnant and postpartum women lost access to maternal health services. Their physical and mental health deteriorated as a result. The qualitative studies told the same story from the inside, in the voices of the women living through it.
Four outcomes emerged consistently across both types of research: difficulty accessing maternal health services, malnutrition, elevated stress, and mortality. These are not abstract harms. A woman unable to reach a clinic cannot be screened for complications. A woman under sustained stress faces higher miscarriage risk. A malnourished pregnant woman cannot adequately nourish her fetus. And some women die—from preventable causes, from conditions that would be manageable with timely care.
But here is the problem the researchers identified: most of the existing evidence comes from studies conducted in middle-income countries, not the poorest regions where the stakes are highest. Some studies were set in low-income countries but examined pregnant women who lived in wealthy cities or wealthy nations—populations with access to resources and infrastructure that do not reflect the reality of rural or resource-scarce settings. The researchers concluded that these findings cannot simply be transplanted to mothers living in the most vulnerable regions, where infrastructure is already minimal and post-disaster support systems barely exist.
The review reveals a significant gap in knowledge. We know that extreme weather harms maternal health. We know the mechanisms: infrastructure fails, clinics close, supply chains break, women cannot reach care. We know the outcomes: stress, malnutrition, service disruption, death. But we do not yet have robust evidence from the places where this harm is likely most severe—the low-income countries where a single storm can wipe out the fragile systems that keep mothers and babies alive. The researchers are calling for more research, conducted in these regions, that accounts for the reality of resource scarcity and asks how poverty compounds the damage that weather alone inflicts.
Citas Notables
Extreme weather events have a negative impact on maternal health, especially facets of physical and mental health such as stress, malnutrition, access to maternal health services, and mortality— BMJ Open scoping review researchers
La Conversación del Hearth Otra perspectiva de la historia
Why does extreme weather matter more for maternal health in poor countries than in rich ones?
Because the infrastructure is already stretched thin. A flood in a wealthy country might close a hospital for a week. In a low-income region, it might be the only hospital for a hundred kilometers, and it might not reopen for months. The difference is not just scale—it's that there's no backup system.
The study mentions stress as one of the four main outcomes. How does stress during pregnancy actually harm the baby?
Sustained maternal stress triggers hormonal changes that can cross the placenta. Research has linked it to miscarriage, low birth weight, and developmental delays. The mother's nervous system becomes the baby's environment.
You said the evidence is limited. What does that mean practically—for a doctor trying to help a pregnant woman in, say, rural Bangladesh after a cyclone?
It means there's no clear map. We know harm is happening, but we don't have detailed studies from Bangladesh itself showing exactly which complications spike, which services matter most, or how to prepare. Doctors are improvising based on general knowledge, not evidence tailored to their context.
Why did the researchers exclude studies from high-income countries?
Because a hurricane in Florida is a different disaster than a hurricane in Haiti. The U.S. has backup power, supply chains that reroute, insurance, evacuation plans. Haiti doesn't. The findings don't transfer.
What would better research look like?
Studies conducted in low-income regions themselves, following pregnant women through and after extreme weather events, measuring not just whether they survived but what happened to their health—their blood pressure, their nutrition, their mental state, their babies' outcomes. Real data from the places where the problem is worst.