Converging crises and maternal and child health: colonialism, extreme weather, and COVID-19

Climate change is a growing threat to human health, particularly in regions facing overlapping environmental hazards and social inequities. Puerto Rico-a U.S. territory with a colonial history-offers a unique case for examining how multiple disasters, including Hurricane Maria, ongoing earthquakes, and the COVID-19 pandemic, interact with structural vulnerabilities to affect maternal and child health. Despite increasing attention to climate-related health outcomes, little is known about the reproductive health impacts of cumulative disaster exposure in colonial contexts.

We used U.S. National Vital Statistics System data (2017-2021) to assess associations between disaster exposure and six maternal and newborn outcomes: preterm birth, low birthweight, term low birthweight, gestational hypertension, gestational diabetes, and excessive weight gain. Disaster exposure was defined based on the timing of hurricanes and the pandemic, using a three-month lag period. We analyzed data from Puerto Rico and used Florida and Texas as comparison sites. Multivariable log-binomial regression models estimated adjusted prevalence ratios. Effect modification was tested for (1) region within Puerto Rico and (2) colonial status, comparing Puerto Rico (territory) to Florida and Texas (states). Simulations were conducted to account for potential live-birth bias.

Across 104,560 births in Puerto Rico, disaster periods were consistently associated with worse maternal health outcomes. For example, during the late post-hurricane period, gestational diabetes increased (RR = 1.19, 95% CI: 1.08, 1.31), while term low birthweight surprisingly appeared to decline (RR = 0.90, 95% CI: 0.83, 0.98). Associations with newborn health were mixed and may have been underestimated due to sharp declines in live births after disasters. Simulations suggested stronger disaster-related risks than observed in primary analyses. Effect modification by region and colonial status showed inconsistent but notable differences, particularly elevated maternal health risks in certain regions of Puerto Rico and compared to U.S. states.

Our findings suggest that multiple disasters negatively affect reproductive health in Puerto Rico and that structural factors, including colonialism, may exacerbate these impacts. Public health responses must account for cumulative disaster exposure and systemic inequities to better support maternal and child health in marginalized settings, especially as climate change continues to intensify.