Impact of Heatwaves on Mortality in India
A recent study estimates the significant impact of extreme heat on mortality rates across India, highlighting the urgent need for targeted adaptation strategies to combat heat-induced fatalities.
Key Findings
- Excess Deaths from Heatwaves:
- A single day of extreme heat results in approximately 3,400 excess deaths throughout India.
- A prolonged five-day heatwave can cause nearly 30,000 excess deaths.
- Regional Vulnerability:
- Heatwave conditions are prevalent in north, central, and east India, with temperatures exceeding 45°C.
- Uttar Pradesh alone accounts for about 8,100 excess deaths during a five-day heatwave.
- Districts such as Ahmedabad, Jaipur, and Surat each see over 250 excess deaths in a single heatwave event.
- Economic Disproportion:
- The states of Uttar Pradesh, Bihar, Madhya Pradesh, Rajasthan, and Gujarat constitute 66% of excess deaths but only 29% of India's GDP.
- There is a 2.3-fold disproportion between mortality burden and economic capacity.
Implications for Policy and Adaptation
- The study suggests that federal adaptation investments should prioritize high-burden, low-GDP states.
- Programs under the National Disaster Management Authority and the National Action Plan on Climate Change should be adjusted to reflect these findings.
- Approximately 44% of excess deaths during a five-day heatwave are projected to occur in the top 100 districts, which represent about one-third of India's population.
The research underscores a critical need for improved heat-resilience strategies and funding allocations to mitigate the disproportionate impact of heatwaves on economically vulnerable regions in India.
