Climate-driven shifts in venomous snake distributions could bring snakebite risks into new regions. This page answers common questions about how warming temperatures may increase overlaps between humans and snakes by mid- and late-century, where new hotspots might emerge, what the WHO-led study found about snake movements, and practical steps communities can take to reduce risk as habitats change.
A WHO-led study maps how warming temperatures are expected to shift the ranges of 508 medically important venomous snakes. As snakes move into new areas where people live, the chance of human-snake encounters rises, potentially increasing snakebite risk by 2050 and again by 2090. The changes depend on regional temperature increases, habitat availability, and how quickly snakes can adapt to new environments.
The study projects overlaps between snakes and human populations in areas where warm climates enable snakes to expand their traditional ranges. This could include parts of continents where warming accelerates habitat suitability for venomous species, leading to higher bite risk in communities that have not previously faced frequent encounters.
Researchers mapped 508 medically important snakes and modeled how future warming will alter overlaps with human populations by 2050 and 2090. The analysis highlights potential shifts in where venomous snakes may appear and how the risk of bites could change as habitats shift with climate conditions.
Communities can reduce risk by improving education about snake safety, strengthening local health response plans, implementing early warning systems, and promoting habitat management to minimize snake-human encounters. Practical steps include securing food sources, eliminating rodent blooms near living areas, using protective clothing when working outdoors, and establishing clear reporting channels for bite incidents.
Public health planning should incorporate climate-adjusted risk assessments, targeted community education in emerging hotspots, and resource allocation for antivenom stockpiles and medical facilities. The goal is to anticipate where risks will grow and ensure rapid, effective treatment is available where new overlaps are likely.
Early indicators in some regions show changes in snake distributions linked to climate shifts, with authorities noting increased encounters as temperatures rise. While the study focuses on projections for 2050 and 2090, ongoing surveillance in warming areas helps validate model predictions and guides proactive public health responses.
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Research led by WHO predicts hotter climate will lead to more contact between humans and venomous snakes