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Asia's Cities Face Devastating Heat Crisis
26 Nov
Summary
- Nine Asian megacities are highly vulnerable to extreme heat.
- Heat stress mortality could double by 2050 across the region.
- Glaciers in High Mountain Asia pose significant flood risks.
Nine densely populated megacities in Asia and the Pacific are facing severe and increasing heat risks, according to a new UN-ESCAP report. Cities like Karachi are particularly vulnerable due to the urban heat island effect, exacerbated by rapid urbanization and insufficient green spaces. Temperatures in these urban areas are projected to rise significantly, straining resources like cooling, water, and healthcare, with disproportionate impacts on children, the elderly, and outdoor workers.
The report forecasts a sharp increase in heat stress across the region, potentially doubling mortality rates by 2050. Beyond urban heat, melting glaciers in High Mountain Asia present a critical secondary threat. These melting glaciers increase the risk of glacial lake outburst floods, exposing millions to potential disasters. Countries like Mongolia, Pakistan, and Uzbekistan are predicted to become more arid as higher temperatures evaporate surface water.
Urgent, strategic action is called for, emphasizing regional cooperation and integrated multi-hazard planning centered on heat. Expanding heat-health warning systems could save thousands of lives annually. The report stresses that the escalating threat of extreme heat demands immediate global attention and a heightened level of urgency to mitigate future disaster losses, which could reach nearly $500 billion under worst-case scenarios.
