A comprehensive meta-analysis published in BMJ Global Health has established that mental health interventions significantly reduce trauma symptoms among individuals affected by extreme weather events. The review examined 33 high-quality studies spanning diverse intervention approaches following hurricanes, floods, wildfires, and heatwaves, demonstrating substantial clinical improvements across multiple mental health domains.
The findings show a 71% reduction in PTSD symptoms following mental health interventions, with standardised mean differences of -2.92 for PTSD, -1.00 for depression, and -0.71 for anxiety. These results represent the first comprehensive evidence synthesis on this critical topic and underscore the urgent need for scalable mental health response protocols as climate-related disasters increase globally.
The research directly addresses WHO’s identification of climate change as a major threat to global mental health, providing evidence-based guidance for healthcare systems and disaster response organisations.
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